СПОСОБ РОТАЦИОННОЙ ПЕЧАТИ ДЛЯ НАНЕСЕНИЯ МАГНИТНЫХ СОСТАВОВ

Изобретение относится к составам и способам изготовления магнитов, которые будут прилипать к поверхности, к которой притягивается магнит. Способ изготовления магнита включает получение намагничиваемого состава, содержащего термопластичный полимерный материал и намагничиваемые частицы, нагрев намагничиваемого состава до температуры, при которой намагничиваемый состав находится в жидкотекучем состоянии, подачу намагничиваемого состава в полость вращающегося цилиндра через неподвижное плоское сопло, вращающийся цилиндр содержит множество отверстий, введение вращающегося цилиндра в контакт с подложкой, при этом плоское сопло проталкивает намагничиваемый состав через отверстия во вращающийся цилиндр и намагничиваемый состав прилипает к подложке. Изобретение позволяет усовершенствовать способ изготовления магнитов. 2 н. и 19 з.п. ф-лы, 4 ил.

ХИМИЧЕСКАЯ КОМПОЗИЦИЯ, ЧУВСТВИТЕЛЬНАЯ К ИЗМЕНЕНИЯМ ТЕМПЕРАТУРЫ, СПОСОБ ЕЕ ПОЛУЧЕНИЯ И ЕЕ ИСПОЛЬЗОВАНИЕ

Изобретение относится к химической композиции, чувствительной к температуре и пригодной для получения датчиков для тестирования условий хранения продуктов, которые требуют постоянного хранения при низкой температуре. Описана намагничиваемая химическая композиция, содержащая по меньшей мере один полярный растворитель, выбранный из группы, содержащей спирт с количеством атомов углерода от Cдо С, политетрагидрофуран, или их смесь; ферромагнитный компонент, содержащий множество намагничиваемых частиц Стабильного Однодоменного (СОД) типа, выбранных из группы, содержащей магнетит, замещенный магнетит и/или феррит в количестве от 5 до 15% от объема растворителя, и имеющих диаметр от около 20 до 50 нм; и полимерный компонент, включающий в себя поливинилбутираль (ПВБ) или сополимер поливинилбутираль-виниловый спирт-винилацетат в процентном отношении от 3 до 15% от объема растворителя, причем упомянутый полимерный компонент имеет форму сети или сетки и ограничивает множество ячеек или зон, в каждой ...

ХИМИЧЕСКАЯ КОМПОЗИЦИЯ, ЧУВСТВИТЕЛЬНАЯ К ИЗМЕНЕНИЯМ ТЕМПЕРАТУРЫ, И СПОСОБ ЕЕ ПОЛУЧЕНИЯ И ИСПОЛЬЗОВАНИЯ

... 1. Намагничиваемая химическая композиция, содержащая:- по меньшей мере один полярный растворитель (4), выбранный из группы, содержащей спирт с количеством атомов углерода от Cдо С, политетрагидрофуран, или их смесь;- ферромагнитный компонент, содержащий множество намагничиваемых частиц (1) Стабильного Однодоменного (СОД) типа, выбранных из группы, содержащей магнетит, замещенный магнетит и/или феррит в количестве от 5 до 15% от объема растворителя и имеющих диаметр от около 20 нм до 50 нм; и- полимерный компонент (2), включающий в себя поливинилбутираль (ПВБ) или сополимер поливинилбутираль-виниловый спирт-винилацетат в процентном отношении от 3 до 15% от объема растворителя, причем упомянутый полимерный компонент имеет форму сети или сетки и ограничивает множество ячеек или зон (3), в каждой из которых размещена одна из упомянутых частиц (1), погруженная в упомянутый полярный растворитель (4).2. Композиция по п. 1, отличающаяся тем, что когда упомянутый растворитель содержит спирт с количеством ...

Способ синтеза стабилизированных магнитных наноагентов

Изобретение относится к области химии и медицины, а именно к способу синтеза стабилизированных магнитных наноагентов, включающему следующие стадии: i) коллоидный раствор исходных магнитных наночастиц смешивают с раствором гамма-иммуноглобулинов с целью получения реакционной смеси, при этом гамма-иммуноглобулины имеют конечную концентрацию не менее 1 мг/мл; ii) полученную реакционную смесь нагревают до температуры от 45 до 98°C с целью получения суспензии стабилизированных магнитных наночастиц, причем упомянутые исходные магнитные наночастицы представляют собой кристаллиты магнетита, маггемита, смешанные шпинели на основе железа, никеля или кобальта. Технический результат заключается в создании стабилизированных магнитных наноагентов, предпочтительно специфичных к молекулярным мишеням, способом, отличающимся малым количеством шагов синтеза, улучшенной воспроизводимостью, биобезопасностью (биосовместимостью) и предпочтительно характеризующимся отсутствием дополнительных оболочек или спейсеров ...

Magnetisch anisotropes Bauelement auf Eisenbasis fuer den Hystereseeffekt ausnutzende Rotationsgeraete

Magnetmaterial mit Maximum-Komplex-Permeabilität in quasi-Mikrowellenbereich und Herstellungsverfahren

Magnetmaterial mit Maximum-Komplex-Permeabilität in quasi-Mikrowellenbereich und Herstellungsverfahren

Herstellungsverfahren eines magnetischen Elements mit einem Komposit-Magnetkörper

Improvements relating to the manufacture of ferromagnetic metal particles

Ferro-magnetic particles are produced by electrolytic deposition from electrolyte containing iron on the surface of a liquid metal cathode, e.g. mercury, and introducing below the liquid metal surface a supply of the liquid metal whereby the floating layer of deposited magnetic particles overflows and is then separated into magnetic and non-magnetic material. A cell 1 filled with electrolyte to level 30 is provided with an inner open top cathode vessel 2 containing mercury and above which is mounted an anode 4. A vertical tube 33 discharges mercury fed from a reservoir 15, by a solenoid-operated valve 26, below the surface of the mercury in the vessel 2, and the floating layer runs off through an S-bend 5 into a magnetic separator 32. This separator comprises an inclined rotating screw conveyer 6 having notches at the edge of the screw and mounted in a casing surrounded by magnets 7. The magnetic particles are caught in the notches of the conveyer, and the separated mercury flows into a ...

Article for magnetic heat exchange and methods for manufacturing an article for magnetic heat exchan ge

Improvements in or relating to thermomagnetic control systems

... 623,707. Temperature aiarms. VALENSI, G. May 17, 1947, No. 13307. Convention date, June 20, 1946. [Class 47 (i)] A temperature alarm comprises a transformer having a core 2 of thermomagnetio material with a Curie temperature above the alarm temperature, and perpendicularly arranged primary and secondary windings 5, 6, arranged in circuits which are in resonance with an alternating source 3 at two different temperatures below the alarm temperature. As the alarm temperature is approached, the current in the secondary 6 falls rapidly to allow a switch 8 to close and operate an alarm 9 in mechanical resonance with the source 3.

Woody electric wave absorber

A woody electric wave absorber characterized in that it is a laminate type magnetic wood prepared by pressure-pasting an opposed plate material pair comprising natural wood or a processed woody material via a magnetic layer containing a ferrite powder, it contains a non-magnetic stainless steel powder in an amount of 20 to 80 vol% relative to the ferrite powder, the magnetic layer has a total volume content for the ferrite powder and the non-magnetic stainless steel powder of 10 to 40% and has a thickness of 0.5 to 5.0 mm, it has a central frequency within 1 to 8 GHz, and has an electric wave absorption characteristic of 10 dB or more in a 2.45 GHz band or a 5.2 GHz band of frequency.

Improvements in or relating to a process and apparatus for the manufacture of polycrystalline metal whiskers and the products thereof

Polycrystalline metal whiskers are made by feeding carbonyl of ferromagnetic metals (such as Fe, Co or Ni) into an oxygen free decomposition chamber so as to give 10-4 to 10-10 moles per c.c. of the chamber, against a falling temperature gradient, the metal atoms produced forming chain like aggregates under the influence of a magnetic field. Further carbonyl vapours of ferro- or paramagnetic (such as Mo or W) metals are then fed through the chamber with the temperature of the chains being kept sufficient for coherent deposition of the metals until the whiskers are of the desired thickness. The carbonyl supplied to the vapourizer may be liquid or as a solid carried in an inert solvent. Non metals or metal compounds may be included in the carbonyl vapour for deposition on the chains simultaneously with the metal. Oxidation, carburization or nitration of the metals can be carried out simultaneously with the deposition of the metal or in between successive layers thereof. The fibres produced ...

Trapezoidal wave RMS regulator

Improvements in processes for preparing magnetic image plates

... 854,449. Printing processes, etching. INTERNATIONAL BUSINESS MACHINES CORPORATION. April 24, 1958 [April 24, 1957], No. 13039/58. Class 100 (2) A process of preparing a magnetic image plate comprises the steps of forming a pattern or a first sheet by treating selected portions thereof to change their magnetic response, placing the first sheet in intimate relationship with a second sheet of magnetic material, the planes of both sheets being parallel, applying a unidirectional magnetic flux substantially normal to said sheets, and removing the first sheet to leave said second sheet with a magnetised pattern thereon, said second sheet constituting said plate. The second sheet is first subjected to a unidirectional magnetic flux to produce a uniform magnetic field therein. A process for preparing a printed circuit comprises the steps of (A) forming a pattern on said first sheet, (B) forming said magnetised pattern on said second sheet, (C) forming a pattern on a third sheet, (D) fixing the ...

Alloyed flocks from metal carbonyls and halides

Sintered bodies of 90-93% porosity are prepared by treating iron, nickel or cobalt carbonyl, in the free space of a vessel heated to a temperature in the range 250-300 DEG C., with a liquid halide from the class consisting of chlorides and bromides of arsenic, boron, phosphorus, silicon and titanium to yield flocks containing 0.01-7.5% by weight of the metal of the halide, and sintering the resulting flock. Examples are given of iron containing 0.1% arsenic sintered at 800 DEG C. for 6 hours in a hydrogen atmosphere, nickel containing 0.1% arsenic sintered at 600 DEG C. for 6 hours in a hydrogen atmosphere and also the treatment of nickel containing phosphorus and iron containing boron, titanium or silicon. The sintered bodies may be used as electrodes in electric batteries, and the use of the arsenic-containing iron in recorder tapes is also referred to. Specifications 741,943, 741,978 and U.S.A. Specification 1,759,659 are referred to.

Sealed magnetic contact units

... 1,015,249. Electromagnetic relays. ERICSSON TELEPHONES Ltd. May 22, 1964 [July 3, 1963], No. 26301/63. Heading H2B. At least one of the reeds of a sealed magnetic contact unit has its contact end plated with gold from a hard bright gold solution of the acid type. The reeds are a nickel iron alloy and no preliminary coating of silver or copper is needed.

PROCEDURE FOR THE PRODUCTION OF A MAGNETIC POWDER AND PRODUCTION OF A PERMANENT MAGNET

PERMANENT MAGNETIC ALLOY.

PROCEDURE FOR MANUFACTURING A PERMANENT MAGNET.

THERMOPLASTIC COVERINGS IRON POWDER MATERIALS AND PROCEDURES FOR THEIR PRODUCTION

PROCEDURE FOR THE PRODUCTION OF A PERMANENT MAGNET FROM RARE-EARTH METAL, BORON AND IRON

CONSTRUCTION UNIT FOR THE SUPPRESSION OF HIGH FREQUENCY SIGNALS.

Magnetlegierung with rectangular hysteresis loop

MULTIPHASE PERMANENT MAGNET OF THE FE-B-MM TYPE

MAGNETORESISTIVE TRANSDUCERS AND METHODS OF MANUFACTURE

PROCESS AND APPARATUS FOR IMPROVEMENT OF IRON LOSS OF ELECTROMAGNETIC STEEL SHEET OR AMORPHOUS MATERIAL

PROCESS AND APPARATUS FOR IMPROVEMENT OF IRON LOSS OF ELECTROMAGNETIC STEEL SHEET OR AMORPHOUS MATERIAL A process and an apparatus for improving iron loss of electromagnetic steel sheet or amorphous material are disclosed. In this case, the steel sheet or amorphous material is subjected to an irradiation of plasma flame under specified conditions.

Kraftübertragungseinrichtung mit einem der Einwirkung eines Magnetfeldes unterworfenen, an sich fliessfähigen und magnetisierbaren Mittel

Verfahren zur Herstellung eines Magnetkörpers, Mittel zu dessen Ausführung und danach hergestellter Magnetkörper

Verfahren zur Erhöhung der Selbstinduktion von elektrischen Leitern, Spulen usw. bei Frequenzen oberhalb 109 Hertz.

Acier allié magnétique

Procédé de fabrication d'un produit inoxydable et résistant à la corrosion, magnétiquement doux

Magnetisches Material

Verfahren zur Herstellung von Permanentmagneten

Filtre électrique passe-bas et son procédé de fabrication

Procédé de fabrication d'un dispositif magnétique et dispositif magnétique obtenu par ce procédé

Magnetisches Material und Verwendung desselben

Verfahren zur Herstellung eines zusammengesetzten Körpers und durch dieses Verfahren hergestellter Körper

Verfahren und Vorrichtung zur Strahlenbehandlung von Stoffen

Ferrimagnetischer Thermistor, Verfahren zu seiner Herstellung sowie Verwendung desselben

Ferromagnetischer Werkstoff

Verfahren zur Herstellung eines magnetischen Körpers und Vorrichtung zur Durchführung des Verfahrens

Verfahren zur Herstellung eines ferromagnetischen Werkstoffes, der eine rechteckige Magnetisierungsschleife aufweist sowie nach diesem Verfahren hergestellter Werkstoff

Verfahren und Vorrichtung zur Herstellung von polykristallinen, mindestens teilweise aus Metall bestehenden Haaren

Vorrichtung zur Stromübertragung, insbesondere an einer Elektromagnetkupplung

Magnetically-induced heating self-repairing thermoplastic nanocomposite material

Cast iron with high magnetic permeability and its manufactoring process

INTERNALLY BIASED MAGNETORESISTIVE MAGNETIC TRANSDUCER

Device allowing to decrease the dielectric losses in the high frequency iron cores

Automatic thermomagnetic control

난연성 복합 자성체

... 플레이크형 금속 연성 자성 분말을 35% 이상 55% 이하의 부피 함량으로 포함하는 복합 자성체로서, 하기 방정식 (1) 및 (2) 를 만족시키도록 포스파젠 화합물, 바인더 수지, 및 인-무함유 난연 보조제를 추가로 포함하는 것을 특징으로 하는 복합 자성체가 제공된다: 0.17 ≤ P/B ≤ 0.21 (1) 0.89 ≤ (PN+RA)/B ≤ 2.71 (2) (방정식에서, PN 은 복합 자성체 중의 포스파젠 화합물의 질량% 를 나타내고, RA 는 복합 자성체 중의 난연 보조제의 질량% 를 나타내고, B 는 복합 자성체 중의 바인더 수지의 질량% 를 나타내고, P 는 복합 자성체 중의 인의 질량% 를 나타냄). 복합 자성체는 투자율과 같은 성능 손실 없이 높은 난연성을 부여할 수 있다.

AGGLOMERATING MAGNETIC ALKOXYSILANE-COATED NANOPARTICLES

METHOD OF MAKING DIELECTRIC BODIES WITH SELECTIVELY FORMED CONDUCTIVE OR METALLIC PORTIONS AND COMPOSITES THEREWITH

Magnetoresistance effect film, a method of manufacturing the same, and magnetoresistance effect device

Magnetic thin films 2 and 3 are stacked on a substrate 4 with a nonmagnetic thin film 1 interposed therebetween. An antiferromagnetic thin film 5 is arranged adjacent to one magnetic thin film 3. The inequality Hc2

Magnet and method for manufacturing a magnet

A chemically-machinable glass-magnet composition comprising a photosensitive chemically machinable glass having a magnetic material in admit therewith, wherein the photosensitive chemically machinable glass is formed of SiO2-Li2O-Al2O3 containing photosensitive materials selected from silver, gold and copper and a cerium dioxide sensitizer; and the magnetic material is a Ni-Cu-Zn ferrite.

Magnetic powder, manufacturing method of magnetic powder and bonded magnets

Disclosed herein is a magnetic powder which can provide magnets having excellent magnetic properties and having excellent reliability especially excellent heat stability. The magnetic powder is composed of an alloy composition represented by R_x(Fe_1-aCo_a)_100-x-y-zB_yM_z (where R is at least one kind of rare-earth element excepting Dy, M is at least one kind of element selected from Ti, Cr, Nb, Mo, Hf, W, Mn, Zr and Dy, x is 7.1-9.9 at %, y is 4.6-8.0 at %, z is 0.1-3.0 at %, and a is 0-0.30, and the magnetic powder being constituted from a composite structure having a soft magnetic phase and a hard magnetic phase, wherein when the magnetic powder is mixed with a binding resin and then the mixture is subjected to compaction molding to form a bonded magnet having a density rho[Mg/m³], the maximum magnetic energy product (BH)_max[kJ/m³] of the bonded magnet at a room temperature satisfies the relationship ...

Method of Making a Flexible Magnetized Sheet

A method of making a flexible magnetized sheet is provided. The method may comprise the steps of (1) using cold extrusion to produce a highly viscous fluid magnetizable sheet, (2) passing the sheet through a magnetic field to create an uncured magnetized sheet, and (3) curing the sheet with electron beam curing. The fluid mixture may comprise magnetizable particles with a random charge orientation and an acrylic resin. The components of the mixture are cool when passed through an extrusion die. The extruded fluid sheet allows for the sheet to be magnetized and then, instead of curing by cooling, cured by the bombardment of electrons via an electron beam (EB) generator. The method can eliminate the heat of extrusion and can allow for more freedom of orientation because the sheet does not cure until it reaches the electron beam curing station.

Kontaktfeder fuer ein Schutzrohrrelais

Verfahren zur Herstellung eines Magnetpulvers und Herstellung eines Permanentmagneten

Verfahren zur Herstellung eines Polymerverbundes durch Verwendung eines unidirektional erstarrten riesenmagnetostriktiven Materials

Process for the preparation of nanosized iron oxide by biomimetic route

Process for the preparation of nanosozed iron oxide by biomimetic route

The present invention relates to a biomimetic process for preparation of nanosized magnetite particles used for the enhancement of magnetic resonance imaging contrast.

Magnet and method for manufacturing a magnet

Improvements in or relating to loaded long distance cables

... 354,523. L o a d i n g . S I E M E N S & HALSKE AKT.-GES., Siemensstadt, Berlin. July 16, 1930, No. 21558. Convention date, July 18, 1929. Drawings to Specification. [Class 40 (iv).] The loading of a cable is determined so that the product of hysteresis factor and current strength, which is a measure of the strength of disturbing harmonics, lies below a maximum predetermined for a given quality of transmission. The disturbing harmonics arise from variations of self-induction with signal strength (Flatter effect) and from simultaneous use of the cable for telegraphy and telephony. Hysteresis factor is defined as the factor which when multiplied by the product of current strength and frequency gives the loss due to hysteresis. Loading having a small hysteresis factor is used at the ends of the cable where current strength is greatest. The Specification contains a mathematical investigation of the problem and shows how to ascertain the value of the product of hysteresis factor and current ...

INTERNALLY BIASED MAGNETORESISTIVE MAGNETIC TRANSDUCER

Compound magnet material and electromagnetic interference suppressor

Magnets in intermetallic compounds

Device of filtering of electric frequencies and its manufactoring process

INTERNALLY BIASED MAGNETORESISTIVE MAGNETIC TRANSDUCER

Magnetic materials.

COATING FORMULATION AND APPLICATION OF ORGANIC PASSIVATION LAYER ONTO IRON-BASED RARE EARTH POWDERS

The present disclosure relates to coating formulations for neodymium-iron-boron type magnetic powders manufactured from rapid solidification processes for the purpose, inter alia, of corrosion and oxidation resistance when exposed to aggressive environments. The coating formulation preferably contains an epoxy binder, curing agent, an accelerating agent, and a lubricant. By incorporating coupling agents and optionally, other specialty additives with the magnetic powder and the organic epoxy components, additional oxidation and corrosion prevention, enhanced adhesion and dispersion between the filler and matrix phases can be achieved. This disclosure relates to all such rare earth-transition metal-boron (RE-TM-B) powders produced by rapid solidification and encompasses both the bonded magnet products that include combinations of the materials mentioned and the application processes.

Method of preparing high orientation nanoparticle-containing sheets or films using ionic liquids, and the sheets or films produced thereby

A method is provided for the preparation of nanomaterials, which involves the dissolution and/or suspension of a combination of (a) one or more resin substrate materials and (b) one or more magnetic nanoparticulate substances, in a medium made from one or more ionic liquids, to provide a mixture, and recovering the solid nanomaterial by combining the mixture with a non-solvent (solvent for the ionic liquids but not the other components), while also applying an electromagnetic field to the mixture during the recovering step to align the magnetic nanoparticulate substances, along with the use of the resulting nanomaterials to provide unique information storage media, particularly in the form of sheets or films.

Giant magnetoresistant single film alloys

A single layer film is deposited onto a substrate at room temperature from two sources, one source being a magnetic material, the other being a non-magnetic or weakly-magnetic material. The film is annealed for predetermined time in order to induce phase separation between the magnetic clusters and the non-magnetic matrix, and to form stable clusters of a size such that each magnetic particle, or cluster, comprises a single domain and has no dimensions greater than the mean free path within the particle.

Coating formulation and application of organic passivation layer onto iron-based rare earth powders

The present disclosure relates to coating formulations for neodymium-iron-boron type magnetic powders manufactured from rapid solidification processes for the purpose, inter alia, of corrosion and oxidation resistance when exposed to aggressive environments. The coating formulation preferably contains an epoxy binder, curing agent, an accelerating agent, and a lubricant. By incorporating coupling agents and optionally, other specialty additives with the magnetic powder and the organic epoxy components, additional oxidation and corrosion prevention, enhanced adhesion and dispersion between the filler and matrix phases can be achieved. This disclosure relates to all such rare earth-transition metal-boron (RE-TM-B) powders produced by rapid solidification and encompasses both the bonded magnet products that include combinations of the materials mentioned and the application processes.

Agglomerating magnetic alkoxysilane-coated nanoparticles

The present invention relates to a method for producing a suspension of agglomerates of magnetic alkoxysilane-coated metal nanoparticles, wherein an aqueous suspension of magnetic metal nanoparticles is incubated with alkoxysilane, wherein the incubation is carried out essentially in the absence of an organic solvent. The present invention further relates to suspension of agglomerates of magnetic alkoxysilane-coated metal containing nanoparticles obtainable by the method of the present invention and to a composition comprising agglomerates of magnetic alkoxysilane-coated metal nanoparticles, wherein the agglomerates have an average size of 30 to 450 nm, preferably of 50 to 350 nm and especially of 70 to 300 nm as determined by light scattering.

POWDER OF ß-IRON OXYHYDROXIDE-BASED COMPOUND, ß-IRON OXYHYDROXIDE-BASED COMPOUND SOL, MANUFACTURING METHOD OF POWDER OF e-IRON OXIDE-BASED COMPOUND, AND MANUFACTURING METHOD OF MAGNETIC RECORDING MEDIUM

Provided is a powder of a β-iron oxyhydroxide-based compound that is a group of particles of a ρ3-iron oxyhydroxide-based compound represented by Formula (1) below; in which a surface of the particles of the β-iron oxyhydroxide-based compound is modified with a surface modifier; in which, in a case where the powder is dispersed in water to be made into a sol, a zeta potential of the powder is equal to or higher than +5 mV at pH 10; and β-AaFe1-aOOH (1) in which, in Formula (1), A represents at least one metallic element other than Fe, and a represents a number that satisfies a relationship of 0≤a<1.

СПОСОБ ФОРМИРОВАНИЯ ГИБРИДНОГО МАГНИТНОГО ЭЛЕМЕНТА ДЛЯ РОТОРА ЭЛЕКТРОМАШИНЫ, УСТОЙЧИВОГО К НЕОБРАТИМОМУ РАЗМАГНИЧИВАНИЮ В УСЛОВИЯХ ПЕРЕГРЕВА

Изобретение относится к электротехнике. Технический результат заключается в повышении эффективности функционирования синхронных электроприводов на основе постоянных магнитов (СЭПМ) путем минимизации влияния температурного нагрева на магнитные характеристики постоянных магнитов (ПМ). Уменьшение размагничивания в процессе нагрева обеспечивает уменьшение общих (суммарных) температурных коэффициентов по коэрцитивной силе Hcj и остаточной индукции Вr гибридного магнита в процессе эксплуатации. Способ формирования гибридного магнитного элемента для СЭПМ включает выполнение комбинированных полюсов из магнитных материалов, устойчивых к необратимому размагничиванию. Предварительно выявляют зоны возможного перегрева магнитного элемента ротора, вызывающие необратимое размагничивание при температурах функционирования ротора электромашины. Магнитный элемент ротора выполнен в форме пакета из склеенных между собой деталей из ферромагнитных материалов, число и последовательность расположения которых в ...

Dipolringmagnet für Magnetronzerstäubung oder Magnetronätzung

Mangan-Legierungen für magnetische Werkstoffe, Sputter-Targets aus Mangan-Legierungen und magnetische Dünnfilme

Magnetischer Werkstoff, der eine Manganlegierung aufweist, die Mangan und mindestens eine Legierungskomponente aufweist, wobei die Manganlegierung ausgewählt ist aus der Gruppe bestehend aus: (a) einer Legierung bestehend aus 30 bis 70 Gew.% Mn und 70 bis 30 Gew.% Fe; (b) einer Legierung bestehend aus 10 bis 40 Gew.% Mn und 90 bis 60 Gew.% Pt; (c) einer Legierung bestehend aus 30 bis 70 Gew.% Mn und 70 bis 30 Gew.% Ir; (d) einer Legierung bestehend aus 15 bis 45 Gew.% Mn, 15 bis 45 Gew.% Pd und 25 bis 55 Gew.% Pt; (e) einer Legierung bestehend aus 60 bis 80 Gew.% Mn, 15 bis 35 Gew.% Rh und 0 bis 15 Gew.% Ru; (f) einer Legierung bestehend aus 30 bis 70 Gew.% Mn und 70 bis 30 Gew.% Co; und (g) einer Legierung bestehend aus 30 bis 70 Gew.% Mn und 70 bis...

Fliessfaehiges, magnetisierbares Mittel

VERFAHREN UND VORRICHTUNG ZUR VERBESSERUNG DER EISENVERLUSTE VON BLECHEN AUS ELEKTROMAGNETISCHEM STAHL ODER AUS AMORPHEM MATERIAL.

Magnetic particle having a high-reflective protective membrane and method for producing same

MAGNETIC VOLUME AND MAGNET CORE.

Procedure and device for the production of polycrystallines metal hair

ENHANCED REMANENCE PERMANMENT MAGNETIC ALLOY

Process for the preparation of nanosized iron oxide by biomimetic route

System and method for perturbing a permanent magnet asymmetric field to move a body

A system and method for perturbing a permanent magnet asymmetric field to move a body includes a rotating body configured to rotate about a rotation axis, a permanent magnet arrangement arranged on the rotating body containing two or more permanent magnets, and a perturbation element. The permanent magnet arrangement is configured such that an asymmetric magnetic field is generated by the permanent magnets about a perturbation point. Actuation of the perturbation element at or near the perturbation point causes a tangential magnetic force on the rotating body and/or the permanent magnet arrangement, thereby causing the rotating body to rotate about the rotation axis. The disclosure may also be used for linear motion of a body.

ENHANCED REMANENCE PERMANENT MAGNETIC ALLOY AND BODIES THEREOF

Disclosed is a interacting hard magnetic material. The material consists essentially of a solid mass or assembly of crystallites. Each crystallite has an easy axis of magnetization, e.g., to allow for magnetic orientation within the crystallite. Each of these crystallites are crystallographically non-oriented with adjacent crystallites, which they meet at grain boundaries. The grain boundaries are narrow enough to allow ferromagnetic interaction between adjacent crystallites.

MAGNETIC RIBBON AND MAGNETIC CORE

Disclosed are a magnetic ribbon on at least one surface of which fine particles formed of a nonmagnetic inorganic substance having insulating properties are attached and a magnetic core around which this magnetic ribbon is wound or on which it is laminated. The fine particles serve as a spacer to form a layer of air between adjacent layers of the magnetic ribbon.

DUCTILE METALLIC GLASSES IN RIBBON FORM

The present disclosure relates to an iron based alloy composition that may include iron present in the range of 45 to 70 atomic percent, nickel present in the range of 10 to 30 atomic percent, cobalt present in the range of 0 to 15 atomic percent, boron present in the range of 7 to 25 atomic percent, carbon present in the range of 0 to 6 atomic percent, and silicon present in the range of 0 to 2 atomic percent, wherein the alloy composition exhibits an elastic strain of greater than 0.5% and a tensile strength of greater than 1 GPa.

Improvements with the manufactoring processes of magnetic bodies such as cores

Method of preparation of the improved magnetic material

APPARATUS AND METHOD FOR PRODUCTION OF MAGNECULES FROM WATER

An electrolyzer which decomposes distilled water into a new fuel composed of hydrogen, oxygen and their molecular and magnecular bonds, called HHO. The electrolyzer can be used to provide the new combustible gas as an additive to combustion engine fuels or in flame or other generating equipment such as torches and welders. The new combustible gas is comprised of clusters of hydrogen and oxygen atoms structured according to a general formula HmOn wherein m and n have null or positive integer values with the exception that m and n can not be 0 at the same time, and wherein said combustible gas has a varying energy content depending on its use.

Method for manufacturing magnetic substrate and common mode filter

A common mode filter is manufactured to include a coil part including an insulation layer and a conductor pattern formed in the insulation layer; and a magnetic substrate coupled to one surface or both surfaces of the coil part. The magnetic substrate includes: an electrostatic absorbing layer made of an electrostatic absorbing material; a magnetic layer provided on one surface or both surfaces of the electrostatic absorbing layer and made of a magnetic material; and an electrode provided between the magnetic layer and the electrostatic absorbing layer and made of a conductive material. Therefore, common mode filter may maintain high efficiency characteristics while preventing an electrostatic discharge phenomenon.

СОСТАВ ДЛЯ НАНЕСЕНИЯ ПОКРЫТИЙ И НАНЕСЕНИЕ ОРГАНИЧЕСКОГО ПАССИВИРУЮЩЕГО СЛОЯ НА РЕДКОЗЕМЕЛЬНЫЕ ПОРОШКИ НА ОСНОВЕ ЖЕЛЕЗА

Изобретение относится к порошковой металлургии, в частности к магнитным материалам на основе системы редкоземельный элемент-переходный металл-бор, содержащим магнитный порошок с покрытием, обеспечивающим стойкость к коррозии и окислению при воздействии агрессивных окружающих сред. Состав для нанесения покрытий по отношению к массе магнитного порошка содержит, мас.%: 0,18-4,46 эпоксидной смолы, 0,01-0,27 отвердителя на основе амина, 0,003-0,27 смазки, 0,1-1 органотитанатного или органоцирконатного связывающего агента. Общий вид связывающего агента - (RO-)n(Ti или Zr)(-OR'Y)4-n, где R - неопентил(диаллильная), диоктильная или (2,2-диаллилоксиметил)бутильная группа, Ti или Zr имеет координационное число 4, R' - фосфито-, пирофосфато- или циклический пирофосфато- сегмент, Y - диоктильная или дитридецильная концевая группа, с 1≤n≤4. Введение связывающего агента и других добавок вместе с магнитным порошком и эпоксидным компонентами предотвращает окисление и коррозию, улучшает адгезию и диспергирование ...

МАГНИТНЫЕ ЧАСТИЦЫ

Группа изобретений относится к способам и системам обработки образца для перемешивания, разделения, фильтрации или иной обработки образца (например, жидкого образца (пробы текучей среды)) путем использования магнитных частиц (например, ферримагнитных частиц), которые побуждают перемещаться под действием магнитного узла, расположенного по периферии контейнера, содержащего образец. Магнитная частица содержит магнитный материал, имеющий максимальную напряженность поля в диапазоне от 20 эме/г до 250 эме/г и остаточную намагниченность в диапазоне от 0 эме/г до 30 эме/г, при этом магнитная частица имеет диаметр по меньшей мере 100 нм. Магнитная частица дополнительно содержит наружную поверхность, содержащую лиганд. Лиганд взаимодействует с представляющим интерес аналитом в растворе образца. Технический результат направлен на улучшение перемешивания ферримагнитных частиц в образце, улучшение массопереноса и снижение энергопотребления. 2 н. и 15 з.п. ф-лы, 5 ил., 11 пр., 2 табл.

Способ получения изделия композиционного углеродистого радиопоглощающего (ИКУР)

Изобретение относится к способам получения поглощающих электромагнитные волны композиционных материалов, представляющих собой композиционные материалы на основе высокопористых минеральных наполнителей и электропроводящих частиц. Способ получения поглощающего электромагнитные волны композиционного материала включает процесс смешения компонентов: высокопористого минерального наполнителя с плотностью не более 0,2 г/см3в количестве 50-82% объема, электропроводящего материала 15÷45% объема, связующего 3÷8% объема от общего объема смеси при оборотах 1300-1500 об/мин в течение 35-45 минут. Изобретение позволяет повысить эффективность способа получения поглощающего электромагнитные волны композиционного материала. 7 табл.

Устройство для прессования кольцевых четырехполюсных постоянных магнитов

Полезная модель относится к области порошковой металлургии и может быть использована для изготовления четырехполюсных редкоземельных постоянных магнитов, в частности из сплавов железо-неодим-бор. Устройство содержит четырехполюсный источник текстурующего магнитного поля, матрицу с рабочей полостью и с пазами, в которых установлены двухполюсные постоянные магниты, и центральный знак, который выполнен в виде четырехполюсного цилиндрического магнита, полюса которого соосны полюсам указанного источника текстурующего магнитного поля и противоположны им по знаку. Повышается срок службы устройства. 1 ил., 1 табл. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 194 063 U1 (51) МПК B22F 5/10 (2006.01) B22F 3/02 (2006.01) H01F 1/00 (2006.01) B30B 15/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК B22F 5/10 (2019.08); B22F 3/02 (2019.08); H01F 1/00 (2019.08); B30B 15/02 (2019.08) (21)(22) Заявка: 2019131541, 07.10.2019 (24) Дата начала отсчета срока действия патента: Дата регистрации: 26.11.2019 (45) Опубликовано: 26.11.2019 Бюл. № 33 (54) Устройство для прессования кольцевых четырехполюсных постоянных магнитов (57) Реферат: Полезная модель относится к области установлены двухполюсные постоянные магниты, порошковой металлургии и может быть и центральный знак, который выполнен в виде использована для изготовления четырехполюсных четырехполюсного цилиндрического магнита, редкоземельных постоянных магнитов, в полюса которого соосны полюсам указанного частности из сплавов железо-неодим-бор. источника текстурующего магнитного поля и Устройство содержит четырехполюсный источник противоположны им по знаку. Повышается срок текстурующего магнитного поля, матрицу с службы устройства. 1 ил., 1 табл. рабочей полостью и с пазами, в которых R U 1 9 4 0 6 3 (56) Список документов, цитированных в отчете о поиске: SU 876299 A1, 30.10.1981. SU 1391807 A1, 30.04.1988. US 6756010 B2, 29.06.2004. US 7524453 B2, 28.04.2009. Стр.: 1 U 1 U 1 ...

Printing method for producing thermomagnetic form bodies for heat exchangers

In a method for producing form bodies for heat exchangers, comprising a thermomagnetic material, said form bodies having channels for passage of a fluid heat exchange medium, a powder of the thermomagnetic material is introduced into a binder, the resulting molding material is applied to a carrier by printing methods, and the binder and if appropriate a carrier are removed subsequently and the resulting green body is sintered.

Magnetic-core polymer-shell nanocomposites with tunable magneto-optical and/or optical properties

Methods are disclosed for synthesizing nanocomposite materials including ferromagnetic nanoparticles with polymer shells formed by controlled surface polymerization. The polymer shells prevent the nanoparticles from forming agglomerates and preserve the size dispersion of the nanoparticles. The nanocomposite particles can be further networked in suitable polymer hosts to tune mechanical, optical, and thermal properties of the final composite polymer system. An exemplary method includes forming a polymer shell on a nanoparticle surface by adding molecules of at least one monomer and optionally of at least one tethering agent to the nanoparticles, and then exposing to electromagnetic radiation at a wavelength selected to induce bonding between the nanoparticle and the molecules, to form a polymer shell bonded to the particle and optionally to a polymer host matrix. The nanocomposite materials can be used in various magneto-optic applications.

Metamaterial Particles for Near-Field Sensing Applications

A method and structure for designing near-field probes with high sensitivity used in detecting a wide variety of materials and objects such as biological anomalies in tissues, cracks on metallic surfaces, location of buried objects, or composition of material such as permittivity and permeability . . . etc., is disclosed. The present invention includes using single or multiple metamaterial unit cells or metamaterial particles as near-field sensors. Metamaterial unit cells are defined as the building blocks used for fabricating metamaterials that provide electrical or magnetic properties not found in naturally occurring media. Metamaterial unit cells or particles include split-ring resonators, complementary split-ring resonators, or a variety of other electrically-small resonators made of conducting wires or conducting flat surfaces. Metamaterial unit cells are excited by appropriate excitations such as small loops, microstriplines, etc. depending on the electromagnetic properties of the metamaterial unit cell. Once the metamaterial unit cell is excited, the reflection and transmission coefficients from the excitation mechanism can be measured.

Brownian Microbarcodes for Bioassays

Presented are encoded microparticles, methods of use in biological assays, and flexible, modular instrument systems for conducting a variety of biological assays using the encoded microparticles. The systems include various instrumentation components which are exchangeable and offer a single flexible platform on which a large number of different types of experiments and assays may be conducted including, for example, microarray analysis, encoded microparticle single and multiplex detection, tissue dissection and isolation, and other genetic analysis techniques.

Curable inks comprising coated magnetic nanoparticles

There is provided novel curable ink compositions comprising coated magnetic metal nanoparticles. In particular, there is provided ultraviolet (UV) curable gel inks comprising at least the coated magnetic metal nanoparticles, one curable monomer, a radiation activated initiator that initiates polymerization of curable components of the ink, a gellant. The inks may also include optional colorants and one or more optional additives. These curable gel UV ink compositions can be used for ink jet printing in a variety of applications.

Multistrata nanoparticles and methods for making multistrata nanoparticles

A composition comprising a core comprising an iron oxide, a first shell comprising at least one plasmon active metal at least partially surrounding the core, a second shell comprising a dielectric material at least partially surrounding the first shell, and a third shell comprising at least one plasmon active metal at least partially surrounding the second shell.

Magnetic nanoparticle fabrication

Structures and apparatuses for fabricating magnetic nanoparticles are provided. In one embodiment, a structure for fabricating magnetic nanoparticles is described including a substrate that defines at least one cavity through a portion thereof, and an agglomerate of magnetic nanoparticles within the at least one cavity, wherein the at least one cavity has an aspect ratio of greater than one.

Magnetic nanocomposite material and processes for the production thereof

The present disclosure relates to magnetic nanocomposite materials, and processes for the production thereof. In particular, the present disclosure relates to nanocomposites comprising magnetic nanoparticles surrounded by a polymer, which is bonded to a biodegradable polymer.

Multiple analysis device and method for analyzing cancer cells in blood

Provided are a multiple analysis device and a method of analyzing cancer cells in blood using the device. In this device and method, it can analyze the cancer cells along cancer kinds by using the magnetic nanoparticles combined to the markers of the cancer cells and the difference of the magnetic fields of them.

Methods for producing nanoparticles and using same

A method for producing nanocomposite particles is provided. The method comprises supplying an organic phase fluid an organic phase fluid, an aqueous phase fluid, an amphiphile, and a plurality of hydrophobic nanospecies to a nozzle. An electric field is generated proximate the nozzle such that the fluid exiting the nozzle forms a cone jet that disperses into a plurality of droplets. The plurality of droplets are collected, and nanocomposite particles comprising a self-assembled structure encapsulating at least one hydrophobic nanospecies form by self-assembly.

RARE-EARTH PERMANENT MAGNET AND METHOD FOR MANUFACTURING RARE-EARTH PERMANENT MAGNET

There are provided a rare-earth permanent magnet and a manufacturing method thereof capable of boosting productivity by improving thickness accuracy of a green sheet. In the method, magnet material is milled into magnet powder, and the magnet powder and a binder are mixed to obtain a mixture including 1 to 40 wt % of the binder therein. Next, by high precision coating of a substrate with the mixture, a green sheet is obtained at thickness precision within a margin of error of plus or minus 5% with reference to a designed value. Thereafter, the green sheet is held for predetermined time at binder decomposition temperature in non-oxidizing atmosphere, whereby depolymerization reaction or the like changes the binder into monomer and thus removes the binder. The green sheet with the binder removed therefrom undergoes pressure sintering such as SPS method so as to obtain a permanent magnet 1. A rare-earth permanent magnet manufactured through steps of:milling magnet material into magnet powder;preparing a mixture by mixing the magnet powder and a binder so that the binder is included at a rate of 1 to 40 wt % with reference to total weight of the magnet powder and the binder;obtaining a green sheet by coating a surface of a substrate with the mixture by high precision coating so that a sheet-like-shaped green sheet has thickness precision within a margin of error of plus or minus 5% with reference to a designed value; andpressure sintering the green sheet.2. The rare-earth permanent magnet according to claim 1 , wherein claim 1 , in the step of obtaining the green sheet claim 1 , 'thickness of the green sheet thus coated with the mixture is measured so as to perform feed back control of a gap between the slot die and the substrate based on a measured thickness.', 'the substrate is coated with the mixture by using a slot die, and'}3. The rare-earth permanent magnet according to claim 1 , wherein claim 1 , in the step of pressure sintering the green sheet claim 1 , the ...

Magnetic Nanoclusters

A method for preparing magnetic materials is disclosed. The magnetic materials are prepared by implanting low energy magnetic ions into a substrate and annealing with a charged particle beam. Magnetic materials comprising magnetic nanoclusters in the near-surface region of a substrate are also disclosed. The magnetic materials are useful in, for example, magneto-electronic devices such as magnetic sensors.

THIN-FILM MAGNETIC OSCILLATION ELEMENT

A thin-film magnetic oscillation element includes a pinned magnetic layer, a free magnetic layer, a nonmagnetic spacer layer provided between the pinned magnetic layer and the free magnetic layer, and a pair of electrodes, in which the easy axis of magnetization of the pinned magnetic layer lies in an in-plane direction of the plane of the pinned magnetic layer, and the easy axis of magnetization of the free magnetic layer lies in a direction normal to the plane of the free magnetic layer. Preferably, the relationship between the saturation magnetization Ms and the magnetic anisotropy field Ha of the free magnetic layer satisfies Ms Подробнее

Stable Iron Oxide Nanoparticles and Method of Production

A method of preparing a dispersion of stabilized iron oxide nanoparticles that comprise cores and coatings on the cores, which comprise zwitterionic functional groups chemically bound to the cores, using a single solution that comprises dissolved iron ions and a zwitterion silane and/or a hydrolyzed product of the zwitterion silane.

PROTECTIVE COATING OF MAGNETIC NANOPARTICLES

Encapsulated particles and methods for manufacturing encapsulated particles and structures are described. Such particles may have a length no greater than 40 nm, and include at least one material selected from the group consisting of ferromagnetic materials and ferrimagnetic materials. A polymeric encapsulant surrounds the particle, the polymeric encapsulant including a phase-separated block copolymer including a glassy first phase and a rubbery second phase, the glassy first phase positioned between the particle and the second rubbery phase. The glassy first phase includes a hydrophobic copolymer having a glass transition temperature of at least 50° C. The rubbery second phase includes a polymer having at least one of (i) a glass transition temperature of no greater than 30° C., and (ii) a tan delta peak maximum of no greater than 30° C. Other embodiments are described and claimed. 1. An encapsulated particle comprising:a particle having a length no greater than 40 nm;the particle comprising at least one material selected from the group consisting of ferromagnetic materials and ferrimagnetic materials;a polymeric encapsulant surrounding the particle, the polymeric encapsulant comprising a phase-separated block copolymer including a glassy first phase and a rubbery second phase, the glassy first phase positioned between the particle and the second rubbery phase;the glassy first phase comprising a hydrophobic copolymer having a glass transition temperature of at least 50° C.; andthe rubbery second phase comprising a polymer having at least one of (i) a glass transition temperature of no greater than 30° C., and (ii) a tan delta peak maximum of no greater than 30° C.2. The encapsulated particle of claim 1 , wherein the glassy first phase is in direct contact with the particle claim 1 , and the rubbery second phase is in direct contact with the first phase.3. The encapsulated particle of claim 1 , wherein the particle comprises a material selected from the group ...

Magnetic assembly of nonmagnetic particles into photonic crystal structures

A method of forming colloidal photonic crystal structures, which diffract light to create color, which includes dispersing solid particles within a magnetic liquid media, and magnetically organizing the solid particles within the magnetic liquid media into colloidal photonic crystal structures.

Magneto-Dielectric Polymer Nanocomposites and Method of Making

In accordance with the present invention, novel superparamagnetic magneto-dielectric polymer nanocomposites are synthesized using a novel process. The tunability of the dielectric/magnetic properties demonstrated by this novel polymer nanocomposite, when an external DC magnetic field is applied, exceeds what has been previously reported for magneto-dielectric polymer nanocomposite materials. 1. A superparamagnetic low-loss polymer nanocomposite comprising magnetic nanoparticles coated with a surfactant and substantially uniformly dispersed in a low-loss polymer.2. The superparamagnetic low-loss polymer nanocomposite of claim 1 , wherein the magnetic nanoparticles are FeOnanoparticles.3. The superparamagnetic low-loss polymer nanocomposite of claim 2 , wherein the magnetic nanoparticles are FeOnanoparticles having an average size of approximately 8 nm.4. The superparamagnetic low-loss polymer nanocomposite of claim 1 , wherein the magnetic nanoparticles are CoFeOnanoparticles.5. The superparamagnetic low-loss polymer nanocomposite of claim 4 , wherein the magnetic nanoparticles are CoFeOnanoparticles having an average size of approximately 10 nm.6. The superparamagnetic low-loss polymer nanocomposite of claim 1 , wherein the surfactant is oleylamine.7. The superparamagnetic low-loss polymer nanocomposite of claim 1 , wherein the surfactant is oleic acid.8. The superparamagnetic low-loss polymer nanocomposite of claim 1 , wherein the low-loss polymer is about 25% butadiene resin and copolymer dissolved in xylene.9. A method for preparing a polymer nanocomposite claim 1 , useful as a superparamagnetic low-loss material claim 1 , comprising the steps of:coating magnetic nanoparticles with surfactants;dissolving a low-loss polymer and the coated magnetic nanoparticles in hexane; andmagnetically stirring the dissolved low-loss polymer and coated magnetic nanoparticles to obtain a polymer nanocomposite having substantially uniform dispersion.10. The method of claim 9 , ...

Magnetic exchange coupled core-shell nanomagnets

A permanent magnet is fabricated such that it has a magnetically hard core surrounded by a thin magnetically soft shell. The magnetically hard core provides a relatively high intrinsic coercivity (H ci ), and the magnetically soft shell provides a relatively high magnetic flux density (B). Due to magnetic exchange coupling between the core and shell, a relatively high maximum energy product (BH) max is achievable over a wide temperature range, including temperatures above 150° C. Further, such effects can be achieved without using rare-earth metals or precious metals helping to keep the manufacturing costs of the magnet low. To allow sufficient exchange magnetic coupling between the core and shell, the width of the shell is less than about 40 nanometers, and the overall dimensions are controlled such that the width of the shell is less than two times the Bloch domain wall thickness of the core.

Multiple discrimination device and method of manufacturing the device

Provided are a multiple discrimination device and a method of manufacturing the same. According to the multiple discrimination device, a three-dimensional micro ferromagnetic pattern is optimally designed and arranged to allow a magnetic force applied to a discrimination-target particle to be discriminated to be well controlled to perform discrimination well. The method employs a semiconductor processing technology, thereby precisely manufacturing and allowing mass production.

Artificial electromagnetic material

The present invention provides an artificial electromagnetic material, comprising at least one material sheet layer; wherein each material sheet layer is provided with a first substrate and a second substrate which are oppositely arranged; and a plurality of artificial microstructures are attached on a surface, facing the second substrate, of the first substrate. The first substrate and the second substrate on both sides of the artificial microstructure are in such tight contact therewith that the number of electric field lines passing through the substrates is increased and the equivalent permittivity of the artificial electromagnetic material is effectively improved.

Magnetic board and method for manufacturing the same

Disclosed herein is a magnetic board including a composite film including a rigidity film and a ductility film, and a magnetic sheet attached to one surface of the composite film and having fracture lines formed on portions joined with the ductility film.

MAGNETIC POWDER, FORMING METHOD THEREOF AND MAGNETIC SHEET

A magnetic powder comprises a first magnetic particle, one or more inorganic insulating particles and one or more second magnetic particles. The first magnetic particle is made of a soft magnetic metal. The first magnetic particle has a flat shape. The inorganic insulating particles are attached to the first magnetic particle. The inorganic insulating particles partially cover the first magnetic particle. Each of the second magnetic particles is made of a soft magnetic metal. Each of the second magnetic particles has a flat shape. The second magnetic particles are attached to the first magnetic particle via the inorganic insulating particles. 1. A magnetic powder comprising:a first magnetic particle made of a soft magnetic metal, the first magnetic particle having a flat shape;one or more inorganic insulating particles attached to the first magnetic particle, the inorganic insulating particles partially covering the first magnetic particle; andone or more second magnetic particles each made of a soft magnetic metal, each of the second magnetic particles having a flat shape, the second magnetic particles being attached to the first magnetic particle via the inorganic insulating particles.2. The magnetic powder as recited in claim 1 , wherein the first magnetic particle has a composition same as a composition of the second magnetic particle.3. The magnetic powder as recited in claim 1 , wherein:the first magnetic particle has a first major axis which is longer than any other line included in the first magnetic particle, the first major axis having a first major length;each of the second magnetic particles has a second major axis which is longer than any other line included in the second magnetic particle, the second major axis having a second major length; andan average of ratios, each of which is a ratio of the second major length to the first major length, is smaller than 1/2.4. The magnetic powder as recited in claim 1 , wherein:the first magnetic particle has a ...

MAGNETIC NANOPARTICLES FOR NUCLEIC ACID PURIFICATION

The present invention relates to monodisperse silanized ferrimagnetic iron oxide particles, a method for producing the same and a method for independent generic binding of nucleic acid molecules to the particles. 1. A method for producing a plurality of silanized ferrimagnetic iron oxide particles for independent generic nucleic acid binding , wherein the method comprises the steps of:(a) adding an iron(II) salt to a liquid glycol to obtain a solution, 'wherein during steps (a) and (b) a first temperature is applied to the solution and wherein steps (a) and (b) the solution is gassed with nitrogen,', '(b) raising the pH of the solution to a value of at least 9 such that a precipitate is obtained,'}(c) mixing the solution comprising the precipitate at a second temperature such that ferrimagnetic iron oxide particles are obtained, and(d) contacting the ferrimagnetic iron oxide particles with a silicate solution such that silanized ferrimagnetic iron oxide particles are obtained.2. The method of claim 1 , wherein contacting the ferrimagnetic iron oxide particles with the silicate solution comprises the steps of:(d1) sonificating the silicate solution comprising the ferrimagnetic iron oxide particles,(d2) lowering the pH of the silicate solution to a value of 6 or below such that silanized ferrimagnetic iron oxide particles are obtained,(d3) washing of the silanized ferrimagnetic particles with water, and(d4) washing of the silanized ferrimagnetic particles with isopropanol such that crosslinking occurs within the silicate layer.3. The method of claim 1 , wherein the iron(II) salt is soluble in the liquid glycol and wherein the iron(II) salt is selected from the group consisting of FeCl claim 1 , FeSO claim 1 , FeAcand the hydrated forms thereof.4. The method of claim 1 , wherein the liquid glycol is triethylene glycol.5. The method of claim 1 , wherein the pH of the solution in step (b) is raised to a value of 10.5 using sodium hydroxide.6. The method of claim 1 , ...

IRON-BASED OXIDE MAGNETIC PARTICLE POWDER, METHOD FOR PRODUCING SAME, COATING MATERIAL, AND MAGNETIC RECORDING MEDIUM

An iron-based oxide magnetic particle powder has a narrow particle size distribution a small content of fine particles that do not contribute to magnetic recording characteristics, and a narrow coercive force distribution, to enhance magnetic recording medium density. Neutralizing an aqueous solution containing a trivalent iron ion and an ion of the metal substituting a part of the Fe sites by adding an alkali to make pH of 1.5 or more and 2.5 or less, adding a hydroxycarboxylic acid, and further neutralizing by adding an alkali to make pH of 8.0 or more and 9.0 or less are performed at 5° C. or more and 25° C. or less. A formed iron oxyhydroxide precipitate containing the substituting metal element is rinsed with water, then coated with silicon oxide, and then heated thereby providing e-type iron-based oxide magnetic particle powder. The rinsed precipitate may be subjected to a hydrothermal treatment. 1. An iron-based oxide magnetic particle powder comprising ε-FeOhaving an average particle diameter measured with a transmission electron microscope of 10 nm or more and 30 nm or less , a part of Fe sites of which is substituted by another metal element , the iron-based oxide magnetic particle powder having a value of I/Idefined below of 0.7 or less and a value of α/εdefined below of 0.1 or less ,{'sub': H', 'L, 'sup': '2', 'wherein Irepresents an intensity of a peak present on a high magnetic field side in a differential B-H curve obtained by numerical differential of a B-H curve obtained by measuring under conditions of an applied magnetic field of 1,035 kA/m (13 kOe), an M measurement range of 0.005 A·m(5 emu), a step bit of 80 bit, a time constant of 0.03 sec, and a wait time of 0.1 sec; and Irepresents an intensity of an intercept of an ordinate at zero magnetic field in the differential B-H curve, and'}{'sub': s', 's, 'αrepresents a maximum value of a diffraction intensity except for background in X-ray diffractometry at 2θ of 27.2° or more and 29.7° or less; ...

MAGNETICALLY-DRIVABLE MICROROBOT

A method of making a magnetically-drivable microrobot that is suitable for carrying and delivering cells includes photo-curing a photo-curable material composition to form a body of the magnetically-drivable microrobot. The photo-curable material composition includes a degradable component, a structural component, a magnetic component, and a photo-curing facilitation composition including a photoinitiator component and a photosensitizer component. 1. A method of making a magnetically-drivable microrobot , the method comprising:photo-curing a photo-curable material composition to form a body of the magnetically-drivable microrobot; a degradable component;', 'a structural component;', 'a magnetic component; and', 'a photo-curing facilitation composition comprising a photoinitiator component and a photosensitizer component., 'wherein the photo-curable material composition comprises2. The method of claim 1 , wherein the degradable component comprises poly(ethylene glycol) diacrylate (PEGDA) or like poly(ethylene glycol) (PEG) derivatives.3. The method of claim 1 , wherein the structural component comprises pentaerythritol triacrylate (PETA).4. The method of claim 1 , wherein the magnetic component comprises Fe3O4 particles.5. The method of claim 4 , wherein the Fe3O4 particles comprise Fe3O4 nanoparticles.6. The method of claim 1 , wherein the photo-curing is performed selectively using lithography.7. The method of claim 6 , wherein the photo-curing is performed selectively using 3D laser lithography or multiphoton lithography.8. The method of claim 1 , further comprising coating or applying a photoacoustic imaging contrast agent on at least part of the body.9. The method of claim 8 , wherein the contrast agent comprises gold.10. The method of claim 1 , further comprising forming the photo-curable material composition bymixing the degradable component and the structural component based on a first ratio to form a first mixture, andmixing the first mixture with the ...

NEEL EFFECT® ISOLATED DC/AC CURRENT SENSOR INCORPORATED IN A PCB

A current sensor includes at least one primary circuit that is intended to conduct the current to be measured, and a secondary circuit containing at least four Neel-effect® transducers, each having a coil and a superparamagnetic core. The current sensor is designed on the basis of a printed circuit board, the primary circuit including at least two distinct metal tracks that are composed of one and the same metal and connected to one another by a via made of a rivet, of a tube or of an electrolytic deposit of the same metal. 1. A current sensor comprising: at least one primary circuit intended to conduct the current to be measured , and a secondary circuit comprising at least four Neel Effect® transducers each constituted by a coil and a superparamagnetic core , said sensor is designed on the basis of a printed circuit , the primary circuit comprising at least two distinct metal tracks composed of one and the same metal and connected together by at least two vias constituted by the same metal as the metal tracks.2. The sensor according to claim 1 , characterized in that the primary circuit is a multilayer conductor of the printed circuit.3. The sensor according to claim 1 , characterized in that the Neel Effect® coils are solenoids wound round an elongated core claim 1 , the whole being a component embedded in the printed circuit.4. The sensor according to claim 1 , characterized in that each Neel Effect® transducer is a flat coil produced in the printed circuit.5. The sensor according to claim 1 , characterized in that each superparamagnetic core is composed of a matrix produced from epoxy resin.6. The sensor according to claim 1 , characterized in that the four Neel Effect® transducers constitute two antiparallel-mounted differential pairs.7. The sensor according to claim 1 , characterized in that it further comprises at least one pair of transducers wound without magnetic cores with differential arrangement with respect to a single one of the two metal tracks.8. ...

SUPERPARAMAGNETIC IRON COBALT ALLOY AND SILICA NANOPARTICLES OF HIGH MAGNETIC SATURATION AND A MAGNETIC CORE CONTAINING THE NANOPARTICLES

Thermally annealed superparamagnetic core shell nanoparticles of an iron-cobalt alloy core and a silicon dioxide shell having high magnetic saturation are provided. A magnetic core of high magnetic moment obtained by compression sintering the thermally annealed superparamagnetic core shell nanoparticles is also provided. The magnetic core has little core loss due to hysteresis or eddy current flow. 1. A thermally annealed superparamagnetic core shell nanoparticle , comprising:a superparamagnetic core of an iron cobalt alloy; anda shell of a silicon dioxide directly coating the core;whereina diameter of the iron cobalt alloy core is 200 nm or less,the core shell particle is obtained by a process comprising:wet chemical precipitation of the core;{'sub': 's', 'coating of the core with a silicon dioxide shell to obtain a thermally untreated core shell nanoparticle having a magnetic saturation (M); and'}{'sup': 'TA', 'sub': 's', 'thermal annealing of the untreated core shell nanoparticle to obtain the thermally annealed superparamagnetic core shell nanoparticle having a magnetic saturation (M);'}{'sup': 'TA', 'sub': s', 's, 'wherein Mis equal to or greater than 1.25M.'}2. The thermally annealed superparamagnetic core shell nanoparticle according to claim 1 , wherein the thermal annealing comprises heating the core shell nanoparticle having a magnetic saturation (M) at a temperature of from 150° C. to 600° C. for from 3 to 180 seconds.3. The thermally annealed superparamagnetic core shell nanoparticle according to claim 1 , wherein a coercivity value of the thermally untreated core shell nanoparticle (H) and a coercivity value of the thermally treated core shell nanoparticle (H) are substantially equal.4. The thermally annealed superparamagnetic core shell nanoparticle according to claim 1 , wherein the superparamagnetic core consists of an iron cobalt alloy.5. The thermally annealed superparamagnetic core shell nanoparticle according to claim 1 , wherein the diameter of ...

Utilizing Nanoscale Materials and Dispersants, Surfactants or Stabilizing Molecules, Methods of Making the Same, and the Products Produced Therefrom

Novel dispersions of nanoparticles such as carbon nanotubes, carbon nanofibers, boron nanotubes, clay nanotubes, other nanotube species, buckminster fullerenes, graphene, graphene nanoplatelets, elements, oxides, nanoparticles, nanoclusters, nanopowders, nanocrystals, nanoscale molecules, other nanoscale materials, as well as products produced therefrom are described. These dispersions can then be further processed into a wide variety of products including but not limited to composite materials, polymers, resins, epoxies, emulsions, cements, coatings, clays, films, membranes, paper, fibers, inks, paints, pastes, electronics, spintronics, optics, biotechnology materials, electrodes, field emission or other displays, plating, capacitance, ceramics, catalysts, days, ballistic materials, drug delivery, doping, magnetics, dielectrics, barrier layers, selective ion flow membranes, batteries, fuel cells, solar and other applications. The invention can also be used to protect electronics from electromagnetic interference, radio frequency interference or radio frequency identification. Most applications that utilize nanoparticles can benefit from this invention. 1. A material comprising:a. a nanoscale material to be utilized, andb. a nanoscale material providing a dispersant, surfactant, or stabilizing molecule action with a concentration from 5-500 wt % of the material being dispersed, andc. an optional material conducting, semiconducting, optical or magnetic material is added to produce a doping effect or a blend of items b and c, andd. whereby said material being in any phase comprising of said material being utilized, said nanoscale material providing a dispersant, surfactant or stabilizing molecule action, said optional material if present, can be further processed or utilized.2. The nanoscale material to be utilized as defined in is consists of:carbon nanotubes, boron nanotubes, buckminster fullerenes, carbon nanofibers, graphene, graphene oxide, graphene nanoplatelets ...

Magnetic micro-particles

A magnetic micro-particle (201) comprising one or more magnetic nano-wires (202).

Biocompatible nanomagnetic discs and methods of use thereof

Provided herein are compositions including biocompatible magnetizeable nanoparticles. The nanoparticles have a diameter (average diameter) from about 10 to about 300 nanometers and are biocompatible and magnetic. The nanoparticles may be a disc formed from iron oxide. The disc may be conjugated to a target-binding moiety capable of binding a target. The target may be cancer cells, pathogens, fat cells, or atherosclerotic plaques.

NANOPARTICLES FOR MAGNETIC RESONANCE IMAGING APPLICATIONS

A method of preparing a coated nanoparticle can include decomposing a compound to produce a nanoparticle, oxidizing the nanoparticle to produce an oxidized nanoparticle, and coating the oxidized nanoparticle with a zwitterionic ligand to produce the coated nanoparticle. The coated nanoparticle or the nanoparticle can be used in magnetic resonance imaging. 1. A method of preparing a coated nanoparticle comprising: decomposing a compound in a solvent including an acid to produce a nanoparticle , oxidizing the nanoparticle with a reagent to produce an oxidized nanoparticle , and coating the oxidized nanoparticle with a zwitterionic ligand to produce the coated nanoparticle.2. The method of claim 1 , wherein the coated nanoparticle is magnetic.3. The method of claim 1 , wherein the acid includes an oleic acid.4. The method of claim 1 , wherein the acid includes a stearic acid.5. The method of claim 1 , wherein the solvent includes a 1-hexadecene claim 1 , a 1-octadecene claim 1 , a 1-eicosene claim 1 , a 1-dococene claim 1 , or a 1-tetracosane claim 1 , or a mixture thereof.6. The method of claim 1 , wherein the compound includes an iron oleate.7. The method of claim 1 , wherein the coated nanoparticle includes an iron oxide.8. The method of claim 1 , wherein the reagent includes an alkyl amine oxide.9. The method of claim 1 , wherein a hydrodynamic diameter of the coated nanoparticle is between 5 nm and 10 nm.10. The method of claim 1 , wherein an inorganic core of the coated nanoparticle has a size of between 2.5 nm and 7 nm.11. The method of claim 1 , wherein the coated nanoparticle has a hydrodynamic diameter of less than 5 nm.12. The method of claim 1 , wherein the zwitterionic ligand includes a zwitterionic dopamine sulfonate ligand.13. The method of claim 1 , wherein the zwitterionic ligand is switched to a dopamine sulfonate ligand.1418-. (canceled)19. A method for magnetic resonance imaging or magnetic resonance angiography comprising:introducing a T1 contrast ...

METHODS FOR SEPARATION OF MAGNETIC NANOPARTICLES

A method of separating magnetic nanoparticles is described. The method comprises placing the magnetic nanoparticles in a periodic magnetic field. The periodic magnetic field varies between a first magnetic field strength and a second magnetic field strength that is higher than the first magnetic field strength. The nanoparticles may be superparamagnetic iron oxide nanoparticles. 1. A method of separating magnetic nanoparticles , the method comprising placing the magnetic nanoparticles in a periodic magnetic field , wherein the periodic magnetic field varies between a first magnetic field strength and a second magnetic field strength that is higher than the first magnetic field strength.2. The method of claim 1 , wherein the first magnetic field strength is less than about 0.2 mT claim 1 , and the second magnetic field strength is from about 0.1 mT to about 300 mT.3. The method of claim 1 , further comprising increasing the second magnetic field strength stepwise.4. The method of claim 1 , wherein the magnetic nanoparticles particles freely diffuse when the periodic magnetic field has the first magnetic field strength.5. The method of claim 1 , wherein the periodic magnetic field varies between the first magnetic field strength and the second magnetic field strength between about 2 and about 10 times before the second magnetic field strength is changed.6. The method of claim 1 , wherein the periodic magnetic field has the first magnetic field strength for a shorter time than the second magnetic field strength.7. The method of claim 1 , wherein the periodic magnetic field is generated by an alternating current and the second magnetic field strength is determined based on the amplitude of the alternating current.8. The method of claim 1 , further comprising applying a flowing fluid to the magnetic nanoparticles after placing the magnetic nanoparticles in the periodic magnetic field claim 1 , wherein the periodic magnetic field is replaced by a continuous magnetic field ...

IRON OXIDE NANOPARTICLES DOPED WITH ALKALI METALS OR ALKALI EARTH METALS CAPABLE OF GIGANTIC AC MAGNETIC SELF-HEATING IN BIOCOMPATIBLE AC MAGNETIC FIELD AND METHOD OF PREPARING THE SAME

Disclosed herein are iron oxide nanoparticles prepared through high-temperature thermal decomposition of an Fe precursor and an M or M (M=Li, Na, K, Mg, and Ca) precursor in an oxygen atmosphere. The iron oxide nanoparticles are nanoparticles, in which an alkali metal or alkali earth metal is doped into an Fe vacancy site of γ-FeO, and generate explosive heat even in a biocompatible low AC magnetic field. Through both in vitro and in vivo tests, it was proven that cancer cells could be killed by performing low-frequency hyperthermia using the iron oxide nanoparticles set forth above. 1. Iron oxide nanoparticles in which γ-FeOis doped with an alkali metal or alkali earth metal.2. The iron oxide nanoparticles according to claim 1 , wherein an Fe vacancy site of γ-FeOis doped with the alkali metal or alkali earth metal.3. The iron oxide nanoparticles according to claim 1 , wherein the alkali metal comprises lithium (Li) claim 1 , sodium (Na) claim 1 , and potassium (K).4. The iron oxide nanoparticles according to claim 1 , wherein the alkali earth metal comprises magnesium (Mg) and calcium (Ca).5. The iron oxide nanoparticles according to claim 1 , wherein the doping metal comprises at least one member selected from the group consisting of Li claim 1 , Na claim 1 , K claim 1 , Mg claim 1 , and Ca.6. The iron oxide nanoparticles according to claim 1 , wherein the iron oxide nanoparticles generate gigantic heat in a biocompatible AC magnetic field of f·Hof 3.0×10Amsor less.7. The iron oxide nanoparticles according to claim 1 , wherein the iron oxide nanoparticles generate gigantic heat in a biocompatible AC magnetic field of f·Hof 1.8×10Ams(f<120 kHz claim 1 , H<15.12 kA/m) or less.8. The iron oxide nanoparticles according to claim 1 , wherein the iron oxide nanoparticles have an intrinsic loss power (ILP) of 13.5 nHm/Kg to 14.5 nHm/Kg in an AC magnetic field of f·Hof 1.8×10Ams(f<120 kHz claim 1 , H<15.12 kA/m) or less.9. The iron oxide nanoparticles according to claim 1 ...

Highly active silica magnetic nanoparticles for purifying biomaterial and preparation method thereof

The present invention relates to a method for preparing highly active silica magnetic nanoparticles, highly active silica magnetic nanoparticles prepared by the method, and a method of isolating nucleic acid using the highly active silica magnetic nanoparticles. The highly active silica magnetic nanoparticles prepared according to the present invention contain magnetic nanoparticles completely coated with silica, can be used as a reagent for isolating biomaterials, particularly, nucleic acids, and can isolate and purify nucleic acid in a high yield.

PERMANENT MAGNET COMPRISING A STACK OF N PATTERNS

A permanent magnet including, at least once per group of ten consecutive ferromagnetic layers, a growth layer directly interposed between a top antiferromagnetic layer of a previous pattern and a bottom antiferromagnetic layer of a following pattern. This growth layer is entirely realized in a nonmagnetic material chosen from the group made up of the following metals: Ta, Cu, Ru, V, Mo, Hf, Mg, NiCr and NiFeCr, or it is realized by a stack of several sublayers of nonmagnetic material disposed immediately on one another, at least one of these sublayers being entirely realized in a material chosen from the group. The thickness of the growth layer is greater than 0.5 nm. 1. A permanent magnet comprising a stack of N patterns stacked one on top of another in a stack direction , where N is a whole number greater than or equal to two , each pattern comprising:a bottom antiferromagnetic layer,a top antiferromagnetic layer, anda ferromagnetic layer situated between the bottom and top antiferromagnetic layers and whose direction of magnetization is frozen, by an exchange coupling, with the bottom or top antiferromagnetic layer of this said pattern,the directions of magnetization of the ferromagnetic layers which are coupled by exchange coupling with the bottom or top antiferromagnetic layer of the same pattern being all identical to each other,wherein:at least once per group of ten consecutive ferromagnetic layers whose directions of magnetization are frozen by exchange coupling, the stack comprises a growth layer interposed between the top antiferromagnetic layer of the previous pattern and the bottom antiferromagnetic layer of the following pattern in the stack direction and this said growth layer is directly in contact with said two top and bottom antiferromagnetic layers between which it is interposed,said growth layer is entirely realized in a nonmagnetic material chosen from the group made up of the following metals: Ta, Cu, Ru, V, Mo, Hf, Mg, NiCr and NiFeCr, or it is ...

HALL BAR DEVICE FOR MEMORY AND LOGIC APPLICATIONS

A hall bar device for a memory or logic application can include a gate electrode, a boron-doped chromia layer on the gate electrode; and a hall bar structure with four legs on the boron-doped chromia layer. For a memory application, the hall bar device can be written to by applying a pulse voltage across the gate electrode and one leg of the hall bar structure in the absence of an applied magnetic field; and can be read from by measuring a voltage across the one leg of the hall bar structure and its opposite leg. 1. A hall bar device for memory and logic applications , comprising:a gate electrode;a boron-doped chromia layer on the gate electrode; anda hall bar structure with four legs on the boron-doped chromia layer,wherein a ferromagnetic state of the boron-doped chromia layer is controlled by a voltage applied across the gate electrode and one leg of the hall bar structure and is read out by a voltage across the one leg of the hall bar structure and its opposite leg while a read-out current is applied at one of the legs orthogonal to the one leg and its opposite leg to generate an in-plane current density.2. The hall bar device of claim 1 , wherein:the hall bar structure comprises platinum.3. The hall bar device of claim 1 , wherein:the gate electrode comprises Vanadium(III) oxide.4. A memory device claim 1 , comprising: a gate electrode;', 'a boron-doped chromia layer on the gate electrode; and', 'a hall bar structure with four legs on the boron-doped chromia layer,', 'wherein a ferromagnetic state of the boron-doped chromia layer is controlled by a voltage applied across the gate electrode and one leg of the hall bar structure and is read out by a voltage across the one leg of the hall bar structure and its opposite leg while a read-out current is applied at one of the legs orthogonal to the one leg and its opposite leg to generate an in-plane current density., 'an array of hall bar devices, each hall bar device comprising5. The memory device of claim 4 , ...

ULTRA-SMALL SUPERPARAMAGNETIC IRON OXIDE NANOPARTICLES

The invention relates to a method for producing an adjusted nanoparticle composition comprising ultra-small superparamagnetic iron oxide nanoparticles coated with dextran-T10, compositions obtained thereby, and uses of such compositions. The adjusted compositions have improved parameters such as lower batch-to-batch variance and improved stability, and are useful as magnetic imaging agents. 1. Method for producing an adjusted nanoparticle composition , the method comprising the steps of:i) providing an ultrafiltrated composition comprising ultra-small superparamagnetic iron oxide nanoparticles coated with dextran-T10;ii) determining the amount of dextran-T10 present in the ultrafiltrated composition of step i);iii) adding an amount of dextran-T10 to the ultrafiltrated composition of step i) to obtain an adjusted composition comprising at least 140 and at most 160 wt.-% of dextran-T10 relative to the wt.-% of iron; andiv) optionally filtering the adjusted composition.2. The method according to claim 1 , wherein the ultrafiltrated composition of step i) or the adjusted composition of step iii) comprises from 1.5-2.5 wt.-% iron.3. The method according to claim 1 , wherein step ii) further comprises determining the amount of iron in the ultrafiltrated composition of step i).4. The method according to claim 1 , wherein step iii) further comprises adding a tonicity agent such as a citrate to the ultrafiltrated composition or to the adjusted composition claim 1 , preferably in an amount of 7-12 wt.-% relative to the wt.-% of iron.5. The method according to claim 1 , wherein the ultrafiltrated composition of step i) further comprises a pharmaceutically acceptable excipient.6. The method according to claim 1 , wherein step iii) further comprises adding an amount of dextran-T1 to the ultrafiltrated composition or to the adjusted composition claim 1 , so that the adjusted composition comprises at least 140 and at most 160 wt.-% dextran-T1 relative to the wt.-% of iron.7. The ...

Nanoparticle, permanent magnet, motor, and generator

At least one elongated core, made of at least one first magnetizable and/or magnetic material, and a shell, surrounding the core and made of at least one second magnetocrystalline anisotropic material, form a nanoparticle. A plurality of such nanoparticles are used in making a permanent magnet. A motor or a generator includes at least one such permanent magnet.

IRON NITRIDE MAGNETIC MATERIAL INCLUDING COATED NANOPARTICLES

The disclosure describes techniques for forming nanoparticles including FeNphase. In some examples, the nanoparticles may be formed by first forming nanoparticles including iron, nitrogen, and at least one of carbon or boron. The carbon or boron may be incorporated into the nanoparticles such that the iron, nitrogen, and at least one of carbon or boron are mixed. Alternatively, the at least one of carbon or boron may be coated on a surface of a nanoparticle including iron and nitrogen. The nanoparticle including iron, nitrogen, and at least one of carbon or boron then may be annealed to form at least one phase domain including at least one of FeN, Fe(NB), Fe(NC), or Fe(NCB). 1. A nanoparticle comprising:{'sub': ['16', '2'], '#text': 'a core comprising at least one FeNphase domain; and a coating comprising at least one of carbon or boron on the nanoparticle.'}2. The nanoparticle of claim 1 , wherein the coating defines a thickness between about 0.5 nanometers and about 50 nanometers claim 1 , and wherein the nanoparticle comprises a diameter between about 0.5 nm and about 200 nm.3. The nanoparticle of claim 1 , further comprising at least one of a transition metal dopant claim 1 , a rare earth metal dopant claim 1 , or an oxide dopant.4. The nanoparticle of claim 3 , wherein the transition metal dopant is selected from Co claim 3 , Mn claim 3 , Cr claim 3 , Ni claim 3 , Ti claim 3 , La claim 3 , or combinations thereof.5. A bulk magnetic material comprising:a plurality of consolidated nanoparticles, wherein at least one of the plurality of consolidated nanoparticles comprises:{'sub': ['16', '2'], '#text': 'a core comprising at least one FeNphase domain; and'}a coating comprising at least one of carbon or boron formed on the nanoparticle.6. The bulk magnetic material of claim 5 , wherein the coating defines a thickness between about 0.5 nanometers and about 50 nanometers claim 5 , and wherein the nanoparticles comprises diameters between about 0.5 nm and about 200 nm. ...

METHOD, A SYSTEM AND A PACKAGE FOR PRODUCING A MAGNETIC COMPOSITE

Provided are methods for producing magnetic composites. In some embodiments, the methods include providing a material in a non-continuous solid form; providing optically resonant particles dispersed within at least a region of said material; and exposing the optically resonant particles to electromagnetic radiation to be absorbed thereby to optically resonate to generate heat to fuse together portions of the material in thermal contact therewith. In some embodiments, the optically resonant particles have magnetic properties and/or are adapted to have magnetic properties induced by a stimulus, and the material is a non-magnetic material. Also provided are systems, computer program products, and packages adapted to implement the presently disclosed methods. 1. A method for producing a magnetic composite , wherein the method comprises:providing a material in a non-continuous solid form;providing optically resonant particles dispersed within at least a region of said material; andexposing at least said optically resonant particles to electromagnetic radiation to be absorbed thereby to optically resonate to generate heat to at least partially fuse together portions of said material in thermal contact therewith;wherein said optically resonant particles have magnetic properties and/or are adapted to have magnetic properties induced by a stimulus, and said material is a non-magnetic material.2. The method according to claim 1 , wherein said optically resonant particles are:ferromagnetic, ferrimagnetic, paramagnetic or superparamagnetic particles; and/orare non-magnetic but adapted to become permanently or temporarily ferromagnetic, ferrimagnetic, paramagnetic or superparamagnetic during and after being exposed to said stimulus.3. The method according to claim 1 , wherein said stimulus is an external magnetic field stimulus and/or a temperature stimulus associated to a temperature which is different than room temperature.4. The method according to claim 1 , further ...

Method and system for manufacture and use of macroporous beads in a multiplex assay

Macroporous beads and a method of manufacturing and using such macroporous beads. wherein the beads are distinguishable for use in a multiplex assay. Preferably, the beads are distinguishable by two or more unique fluorochromes, and at least some of the beads are magnetically responsive. In a preferred form, some of the macroporous beads have interior pores with a different moiety from the exterior surface, allowing beads with different attached functional groups.

Superparamagnetic particle scaffold for regenerating damaged neural tissue

The invention generally relates to a method of regenerating a nerve fiber in a damaged neural tissue of a patient, the method comprising the steps of: administering an aqueous formulation comprising superparamagnetic particles to the damaged neural tissue in the patient; applying a magnetic field in an orientation which is parallel to the nerve fiber; using the magnetic field for aligning the superparamagnetic particles; forming one or more aligned chains of the superparamagnetic particles in the magnetic field as a scaffold to guide directional growth of regenerating nerve cells; and reconnecting damaged nerve ends in the damaged neural tissue of the patient.

SENSOR

According to one embodiment, a sensor includes a supporter, a film portion, a first element, and a first magnetic portion. The supporter includes a first support portion and a second support portion. The film portion includes a first partial region supported by the first support portion. The first element is provided at the first partial region. The first element includes a first electrode region, a first opposing electrode region, and a first magnetic layer provided between the first electrode region and the first opposing electrode region. A direction from the second support portion toward the first magnetic portion is aligned with a first direction. The first direction is from the first opposing electrode region toward the first electrode region. At least a portion of the first magnetic portion overlaps at least a portion of the first element in a direction crossing the first direction. 1. A sensor , comprising:a supporter including a first support portion and a second support portion;a film portion including a first partial region supported by the first support portion;a first element provided at the first partial region, the first element including a first electrode region, a first opposing electrode region, and a first magnetic layer provided between the first electrode region and the first opposing electrode region; anda first magnetic portion,a direction from the second support portion toward the first magnetic portion being aligned with a first direction, the first direction being from the first opposing electrode region toward the first electrode region,at least a portion of the first magnetic portion overlapping at least a portion of the first element in a direction crossing the first direction.2. A sensor , comprising:a supporter including a first support portion and a second support portion;a film portion including a first partial region supported by the first support portion;a first element provided at the first partial region, the first element ...

FERROMAGNETIC METAL NANOWIRE DISPERSION AND METHOD FOR MANUFACTURING SAME

The present invention provides a ferromagnetic metal nanowire dispersion having an excellent dispersibility, from which a ferromagnetic metal nanowire film having an excellent electrical conductivity can be made. The present invention relates to a ferromagnetic metal nanowire dispersion comprising a ferromagnetic metal nanowire and a polymer compound. 1. A ferromagnetic metal nanowire dispersion comprising:a ferromagnetic metal nanowire; anda polymer compound.2. The dispersion of claim 1 , comprising a layer of the polymer compound on a surface of the ferromagnetic metal nanowire.3. The ferromagnetic metal nanowire dispersion of claim 1 , further comprising a dispersing medium selected from the group consisting of water claim 1 , an organic solvent and a mixture thereof.4. The ferromagnetic metal nanowire dispersion of claim 3 , wherein the dispersing medium is a solvent that exhibits reducibility or a solvent containing an antioxidant.5. A method for manufacturing the ferromagnetic metal nanowire dispersion of claim 1 , the method comprising a step of:reducing a ferromagnetic metal ion in a solution of a polymer compound to make a ferromagnetic metal nanowire.6. The method for manufacturing the ferromagnetic metal nanowire dispersion of claim 5 , further comprising a step of:reducing the ferromagnetic metal nanowire.7. The method for manufacturing the ferromagnetic metal nanowire dispersion of claim 5 , further comprising a step of:dispersing the ferromagnetic metal nanowire in a dispersing medium selected from the group consisting of water, an organic solvent and a mixture thereof.8. The method for manufacturing the ferromagnetic metal nanowire dispersion of claim 7 , wherein the dispersing medium is a solvent that exhibits reducibility or a solvent containing an antioxidant.9. An electrically conductive film claim 1 , which is formed from the ferromagnetic metal nanowire dispersion of .10. A laminate comprising a substrate and the electrically conductive film of ...

ASYMMETRICAL MAGNET ARRAYS

Magnet array structure and method for forming magnet array structure that includes a first magnet array including a first repeatable magnet arrangement and second magnet array including a second repeatable magnet arrangement. The first repeatable magnet arrangement includes a plurality of non-uniformly dimensioned magnetic elements and the second repeatable magnet arrangement includes a plurality of non-uniformly dimensioned magnetic elements. Further, the first repeatable magnet arrangement is offset from the second repeatable magnet arrangement to limit attraction forces between the first and second magnet arrays. 1. A magnet array structure , comprising:a first magnet array including a first repeatable magnet arrangement;second magnet array including a second repeatable magnet arrangement,wherein the first repeatable magnet arrangement includes a plurality of non-uniformly dimensioned magnetic elements and the second repeatable magnet arrangement includes a plurality of non-uniformly dimensioned magnetic elements, andwherein the first repeatable magnet arrangement is offset from the second repeatable magnet arrangement to limit attraction forces between the first and second magnet arrays.2. The magnet array structure according to claim 1 , wherein the first and second magnet arrays are parallelly arranged.3. The magnet array structure according to claim 2 , wherein the first and second magnet arrays are linear arrays.4. The magnet array structure according to claim 2 , wherein the first and second magnet arrays are circular.5. The magnet array structure according to claim 1 , wherein the non-uniformly dimensioned magnetic elements of the first repeatable magnet arrangement include a first plurality of magnetic elements having a plurality of at least one of widths and heights and a plurality of magnetic flux orientations claim 1 , andwherein the non-uniformly dimensioned magnetic elements of the second repeatable magnet arrangement include a second plurality of ...

Microcapsules adapted to rupture in a magnetic field to enable easy removal of one substrate from another for enhanced reworkability

An enhanced thermal interface material (TIM) gap filler for filling a gap between two substrates (e.g., between a coldplate and an electronics module) includes microcapsules adapted to rupture in a magnetic field. The microcapsules, which are distributed in a TIM gap filler, each have a shell that encapsulates a solvent. One or more organosilane-coated magnetic nanoparticles is/are covalently bound into the shell of each microcapsule. In one embodiment, (3-aminopropyl)trimethylsilane-coated magnetite nanoparticles are incorporated into the shell of a urea-formaldehyde (UF) microcapsule during in situ polymerization. To enable easy removal of one substrate affixed to another substrate by the enhanced TIM gap filler, the substrates are positioned within a magnetic field sufficient to rupture the microcapsule shells through magnetic stimulation of the organosilane-coated magnetic nanoparticles. The ruptured microcapsule shells release the solvent, which dissolves and/or swells the TIM gap filler, thereby reducing the bond strength between the substrates.

HARD-MAGNET L10-CoPt NANOPARTICLES ADVANCE FUEL CELL CATALYSIS

A method includes converting ˜9 nm soft-magnet Al—CoPt into a hard-magnet L10-CoPt, acid etching the hard-magnet L10-CoPt, and annealing the acid etched hard-magnet L10-CoPt to generate a L10-CoPt/Pt catalyst.

SENSOR

According to one embodiment, a sensor includes a film portion, one or more detectors fixed to the film portion, and a processor. The detector includes first and second detecting elements. The first detecting element includes a first magnetic layer. The second detecting element includes a second magnetic layer. A first change rate of a first signal is higher than a second change rate of the first signal. The first signal corresponds to a first electrical resistance of the first detecting element. A change rate of a second signal with respect to the change of the magnitude of the strain is higher than the second change rate. The second signal corresponds to a second electrical resistance of the second detecting element. The processor is configured to perform at least a first operation of outputting a second value. The second value is based on the second signal and a first value. 1. A sensor , comprising:a film portion;one or more detectors fixed to the film portion; anda processor,a magnitude of a strain of the film portion including a first range, and a second range larger than the first range,the detector including a first detecting element and a second detecting element, the first detecting element including a first magnetic layer, the second detecting element including a second magnetic layer,a first change rate of a first signal being higher than a second change rate of the first signal, the first signal corresponding to a first electrical resistance of the first detecting element, the first change rate being a change rate of the first signal with respect to a change of the magnitude of the strain within the first range, the second change rate being a change rate of the first signal with respect to a change of the magnitude of the strain within the second range,a change rate of a second signal with respect to the change of the magnitude of the strain within the second range being higher than the second change rate, the second signal corresponding to a second ...

REPATTERNABLE NANOIMPRINT LITHOGRAPHY STAMP

A repatternable nanoimprint lithography stamp includes a magnetic substrate and magnetic core nanoparticles. The magnetic substrate includes a magnet and a magnetic mask, and the magnetic core nanoparticles are arranged in a pattern on a surface of the magnetic substrate. The pattern is defined by selective application of a magnetic field to the magnetic substrate using the magnet and the magnetic mask. 1. A repatternable nanoimprint lithography stamp comprising:a magnetic substrate that includes a magnet and a magnetic mask; andmagnetic core nanoparticles arranged in a pattern on a surface of the magnetic substrate, the pattern defined by selective application of a magnetic field to the magnetic substrate using the magnet and the magnetic mask.2. The repatternable nanoimprint lithography stamp of claim 1 , wherein the magnetic core nanoparticles include magnetic core-silica particles.3. The repatternable nanoimprint lithography stamp of claim 2 , wherein the magnetic core-silica particles are surface modified with a surface lubricating agent.4. The repatternable nanoimprint lithography stamp of claim 3 , wherein the surface lubricating agent includes trichloro(3 claim 3 ,3 claim 3 ,4 claim 3 ,4 claim 3 ,5 claim 3 ,5 claim 3 ,6 claim 3 ,6 claim 3 ,7 claim 3 ,7 claim 3 ,8 claim 3 ,8 claim 3 ,9 claim 3 ,9 claim 3 ,10 claim 3 ,10 claim 3 ,10-heptadecafluorodecyl)silane.5. The repatternable nanoimprint lithography stamp of claim 3 , wherein the surface lubricating agent includes a bridged flourosilane.6. The repatternable nanoimprint lithography stamp of claim 6 , wherein the bridged flourosilane includes a vinyl-bridged flourosilane.7. The repatternable nanoimprint lithography stamp of claim 6 , wherein the bridged flourosilane includes an ether-bridged flourosilane.8. A process comprising:forming a patterned magnetic substrate that includes magnetic core nanoparticles arranged in a pattern on a surface of a magnetic substrate, wherein the magnetic substrate includes a ...

POLYETHYLENE GLYCOL BASED OLIGOMERS FOR COATING NANOPARTICLES, NANOPARTICLES COATED THEREWITH, AND RELATED METHODS

In a composition aspect of the invention, a nanoparticle coating comprises repeating polyacrylic acid monomers covalently bound together in an aliphatic chain having a plurality of carboxylic acid functional groups and modified carboxylic acid functional groups extending therefrom. A first portion of the modified carboxylic acid functional groups are modified by a PEG oligomer having a terminal methoxy functional group and a second portion of the modified carboxylic acid functional groups are modified by a PEG oligomer having at least one terminal catechol group. 1. A composition comprising:nanoparticles coated with a coating composition, the coating composition comprising:repeating polyacrylic acid monomer units covalently bound together in an aliphatic chain having a plurality of carboxylic acid functional groups and modified carboxylic acid functional groups extending therefrom, wherein a first portion of the modified carboxylic acid functional groups are modified by a PEG oligomer having a terminal methoxy functional group and a second portion of the modified carboxylic acid functional groups are modified by a PEG oligomer having at least one terminal catechol group.2. The composition of claim 1 , wherein the nanoparticles are coated by being directly bound to the at least one terminal catechol group.3. The composition of claim 1 , wherein the nanoparticles are magnetic.4. The composition of claim 1 , wherein the nanoparticles comprise iron oxide. This application is a divisional application of U.S. application Ser. No. 13/772,632, which was filed Feb. 21, 2014 and which is incorporated herein by reference as if set forth in its entirety. U.S. application Ser. No. 13/772,632 is a continuation-in-part of U.S. application Ser. No. 13/608,119 filed Sep. 10, 2012 and titled “Multidentate Polyethylene Glycol Based Oligomers, Nanoparticles Coated Therewith, and Related Methods,” and which is incorporated herein by reference as if set forth in its entirety. U.S. ...

PERMANENT MAGNET COMPRISING A STACK OF FERROMAGNETIC AND ANTIFERROMAGNETIC LAYERS

A permanent magnet includes at least two antiferromagnetic layers and at least two first ferromagnetic layers. A magnetization direction of each first ferromagnetic layer is set, by an exchange coupling, with one of the antiferromagnetic layers of the stack, parallel to and in the same direction as the magnetization directions of the other first ferromagnetic layers. The permanent magnet also includes at least one second ferromagnetic layer. A magnetization direction of each second ferromagnetic layer is pinned only by RKKY (Ruderman-Kittel-Kasuya-Yosida) coupling with at least one of the first ferromagnetic layers or with at least one other of the second ferromagnetic layers. 113-. (canceled)14. A permanent magnet including a stack of ferromagnetic and antiferromagnetic layers , a magnetic moment of which per unit surface area is greater than (50×10)/(4π)A , the stack comprising:at least two antiferromagnetic layers;at least two first ferromagnetic layers, a magnetization direction of each first ferromagnetic layer being set, by an exchange coupling, with one of the antiferromagnetic layers of the stack, parallel to and in a same direction as the magnetization directions of the other first ferromagnetic layers; andat least one second ferromagnetic layer, a magnetization direction of each second ferromagnetic layer being pinned only by RKKY (Ruderman-Kittel-Kasuya-Yosida) coupling with at least one of the first ferromagnetic layers or with at least one other of the second ferromagnetic layers.15. The magnet as claimed in claim 14 , in which a thickness of each first ferromagnetic layer is selected so that an assembly of the first ferromagnetic layer with the antiferromagnetic layer to which the first ferromagnetic layer is linked by an exchange coupling forms a magnet of which a field H* is of a same sign as a field Hof the magnet and of which an absolute value of the field H* is greater than 795 A/m claim 14 , a field H* being a smallest intensity of magnetic field ...

METHOD FOR GROUPING OF OPTICAL FIBRES

Present disclosure provides a method for grouping of a plurality of optical fibers using first coating layer and magnetic coating layer. The method of the present disclosure includes the step of coating of each of the plurality of optical fibers with a first coating layer and the step of coating of each of the plurality of optical fibers with a magnetic coating layer. Further, the method includes the step of applying magnetic field over the plurality of optical fibers for grouping of the plurality of optical fibers in a predefined manner. Furthermore, the first coating layer serves as a shock absorber to protect the plurality of optical fibers from physical damage. 1. A method for grouping of a plurality of optical fibers , wherein the plurality of optical fibers is coated with a magnetic coating layer , the method comprising:applying magnetic field to the plurality of optical fibers to arrange the plurality of optical fibers in a predefined arrangement.2. The method as recited in claim 1 , wherein magnetic coating layer consists of magnetic material properties and after coating fibers with magnetic coating later claim 1 , all the fibers are placed in one plane where adjacent fibers attract each other to form a ribbon-like structure.3. The method as recited in claim 1 , wherein at the time of splicing claim 1 , a magnetic generator at cable termination magnetizes splice holder for grouping fibers together which in turn leads to better efficiency and reliability of the magnetic bonds between any two adjacent fibers.4. The method as recited in claim 1 , wherein the magnetic field applied for grouping of a plurality of optical fibers is in range of about 0.05 tesla to 60 tesla.5. The method as recited in claim 1 , wherein thickness of the magnetic coating layer is in range of about 10 microns to 70 microns.6. The method as recited in claim 1 , wherein the magnetic field is applied to the plurality of optical fibers to arrange the plurality of optical fibers in the ...

Nanowire-based magnets and methods of making same

The present invention achieves a high-energy product using Ferromagnetic 3D elements such as nanowires and methods of making the same. The high energy products or magnets of the invention are able to achieve high magnetization and maintain the magnetic properties at a greater range of temperatures than currently known magnets. For example, a high energy product includes at least one material A selected from the group consisting essentially of Fe, Co, and Ni, wherein material A is in the form of nanowires formed by a solvothermal chemical process. A high energy product may also include at least one material A selected from the group consisting essentially of Fe, Co, and Ni, and at least one material B selected from the group consisting essentially of Fe, Co, and Ni, wherein material A and material B are in the form of an alloy of nanowires formed by a solvothermal chemical process.

Electromagnetic Digital Materials

Electromagnetic digital materials are made up of a set of voxels, some of which are made from electromagnetically active materials. Each voxel is adapted to be assembled into a structure according to a regular physical geometry and an electromagnetic geometry, and a majority of the voxels in the set are reversibly connectable to other voxels. Voxels in the set may differ in material composition or property from other voxels in the set. Voxels may be arranged into multi-voxel parts that are assembled into the structure according to a regular physical geometry and the electromagnetic geometry. Electromagnetic structures may be made from the electromagnetic digital material, and may be fabricated by an automated process that includes assembling a set of voxels by reversibly connecting the voxels to each other according to a regular physical geometry and an electromagnetic geometry and assembling the reversibly connected voxels into the electromagnetic structure. 1. An electromagnetic digital material , comprising: wherein each voxel in the set is assembled, or adapted to be assembled, into a structure according to a regular physical geometry,', 'wherein a majority of the voxels in the set are each reversibly connected, or adapted to be reversibly connected, to at least two other voxels in the set according to the regular physical geometry,', 'wherein at least some of the voxels in the set are composed of electromagnetically active materials,', 'wherein each voxel in the set is assembled, or adapted to be assembled, into the structure according to an electromagnetic geometry, and', 'wherein a majority of the voxels in the set are each reversibly connected, or adapted to be reversibly connected, to at least two other voxels in the set according to the electromagnetic geometry., 'a set of voxels, the set of voxels comprising one or more subsets of identical voxels,'}2. The electromagnetic digital material of claim 1 , wherein at least some of the voxels in the set differ ...

Apparatus for generating field-free region, apparatus and method for nano magnetic particle image

Disclosed herein is an apparatus for imaging nano magnetic particles using a 3D array of small magnets. A field-free region generation apparatus includes a hexahedral housing having an opening formed in the first surface thereof such that a measurement head is inserted into a spacing area, a pair of rectangular-shaped magnets installed respectively on two surfaces facing each other, among four surfaces perpendicular to the first surface of the housing, and a pair of magnet arrays installed respectively on the first surface of the housing and on another surface facing the first surface, each of the magnet arrays including multiple small magnets arranged along the edge of the opening.

Microwire Array Devices and Methods for Fabricating Polymeric Sheets Containing Microwires

A method for fabricating polymeric sheets containing microwires includes encapsulating at least a portion of individual lengths of a plurality of microwires in a non-conductive polymeric sheet while the microwires are attached to the substrate. The microwires are then detached from the substrate without removing the microwires from the polymeric sheet. The detaching step forms a separated polymeric sheet containing the detached microwires. Individual detached microwires of the plurality are approximately perpendicular to the separated polymeric sheet. A microwire array device includes a non-conductive polymeric sheet and a plurality of microwires. Individual microwires of the plurality have an independent length at least partially encapsulated by the polymeric sheet, are approximately perpendicular to the polymeric sheet, and contain magnetic ferrite. 1. A microwire array device comprising:a non-conductive polymeric sheet; anda plurality of microwires, wherein individual microwires from the plurality of microwires have an independent length at least partially encapsulated by the polymeric sheet, are approximately perpendicular to the polymeric sheet, and contain magnetic ferrite, and wherein each of the plurality of microwires are crystalline and have crystal habits characteristic of nucleation and growth from a substrate.2. The device of claim 1 , wherein the microwire lengths are about 1 μm to about 100 μm claim 1 , and wherein the microwires have a width of about 0.1 μm to about 1 μm.3. The device of claim 1 , wherein the microwires form an array of microwires having an areal density of about 0.1 wire/μmto about 10 wire/μmand are within 20° of perpendicularity.4. The device of claim 1 , wherein the magnetic ferrite is a single bicrystal with a [110] crystallographic orientation along the microwire length.5. The device of claim 1 , wherein the magnetic ferrite comprises MFeO claim 1 , where M is Ni claim 1 , Co claim 1 , Zn claim 1 , or combinations thereof.6. The ...

Nanoparticles as catalytic substrates for real-time biosensing of human performance and diagnostic and therapeutic methods

Nanostructures having an inorganic core and a lipid layer capable of binding a lecithin:cholesterol acyltransferase (LCAT) activator such as an apolipoprotein are provided herein. Methods of using the nanostructures and related devices and compositions for assessing the risk of developing a disease or condition or treating the disease or condition are also provided.

MAGNETIC PLASMONIC NANOPARTICLE POSITIONED ON A MAGNETIC PLASMONIC SUBSTRATE

Described embodiments include a system, method, and apparatus. The apparatus includes a magnetic substrate at least partially covered by a first negative-permittivity layer comprising a first plasmonic outer surface. The apparatus includes a plasmonic nanoparticle having a magnetic element at least partially covered by a second negative-permittivity layer comprising a second plasmonic outer surface. The apparatus includes a dielectric-filled gap between the first plasmonic outer surface and the second outer surface. The first plasmonic outer surface, the dielectric-filled gap, and the second plasmonic outer surface are configured to support one or more mutually coupled plasmonic excitations. 1. An apparatus comprising:a magnetic substrate at least partially covered by a first negative-permittivity layer comprising a first plasmonic outer surface;a plasmonic nanoparticle having a magnetic element at least partially covered by a second negative-permittivity layer comprising a second plasmonic outer surface; anda dielectric-filled gap between the first plasmonic outer surface and the second plasmonic outer surface;wherein the first plasmonic outer surface, the dielectric-filled gap, and the second plasmonic outer surface are configured to support bonding surface plasmons, andwherein the plasmonic nanoparticle is retained on the first plasmonic outer surface by a magnetic attraction between the magnetic substrate and the magnetic element of the plasmonic nanoparticle.2. The apparatus of claim 1 , wherein the magnetic substrate includes a magnetisable substrate.34.-. (canceled)5. The apparatus of claim 1 , wherein the magnetic substrate includes a plurality of magnetized landing or retention areas each configured to magnetically attract the magnetic element of the plasmonic nanoparticle.67.-. (canceled)8. The apparatus of claim 1 , wherein the magnetic substrate includes a magnetic substrate having a switchable magnetic state.9. The apparatus of claim 1 , wherein the ...

MAGNETIC PLASMONIC NANOPARTICLE DIMER

Described embodiments include a system, method, and apparatus. The apparatus includes a plasmonic nanoparticle dimer. The dimer includes a first plasmonic nanoparticle having a first magnetic element covered by a first negative-permittivity layer comprising a first plasmonic outer surface. The dimer includes a second plasmonic nanoparticle having a second magnetic element covered by a second negative-permittivity layer comprising a second plasmonic outer surface. The dimer includes a separation control structure configured to establish a dielectric-filled gap between the first plasmonic outer surface and the second plasmonic outer surface. A magnetic attraction between the first magnetic element and the second magnetic element binds the first plasmonic nanoparticle and the second plasmonic nanoparticle together, separated by the dielectric-filled gap established by the separation control structure. The first plasmonic outer surface, the dielectric-filled gap, and the second plasmonic outer surface are configured to cooperatively support one or more mutually coupled plasmonic excitations. 1. An apparatus comprising:a plasmonic nanoparticle dimer including;a first plasmonic nanoparticle having a first magnetic element at least partially covered by a first negative-permittivity layer comprising a first plasmonic outer surface; anda second plasmonic nanoparticle having a second magnetic element at least partially covered by a second negative-permittivity layer comprising a second plasmonic outer surface; anda separation control structure disposed between the first plasmonic outer surface and the second plasmonic outer surface and configured to maintain a dielectric-filled gap between the first plasmonic outer surface and the second plasmonic outer surface,wherein a magnetic attraction between the first magnetic element and the second magnetic element binds the first plasmonic nanoparticle and the second plasmonic nanoparticle together, separated by the dielectric-filled ...

PRESERVATION OF STRAIN IN IRON NITRIDE MAGNET

A permanent magnet may include a FeNphase in a strained state. In some examples, strain may be preserved within the permanent magnet by a technique that includes etching an iron nitride-containing workpiece including FeNto introduce texture, straining the workpiece, and annealing the workpiece. In some examples, strain may be preserved within the permanent magnet by a technique that includes applying at a first temperature a layer of material to an iron nitride-containing workpiece including FeN, and bringing the layer of material and the iron nitride-containing workpiece to a second temperature, where the material has a different coefficient of thermal expansion than the iron nitride-containing workpiece. A permanent magnet including an FeNphase with preserved strain also is disclosed. 1. A method comprising:{'sub': 16', '2, 'applying, at a first temperature, a layer of material to a strained iron nitride-containing workpiece comprising at least one FeNphase domain, wherein the strained iron-nitride workpiece has dimensions of at least 0.1 mm, such that an interface is formed between the layer and the iron nitride-containing workpiece, wherein the material has a different coefficient of thermal expansion than the iron nitride-containing workpiece; and'}{'sub': 16', '2, 'bringing the iron nitride-containing workpiece and the layer of material from the first temperature to a second temperature different than the first temperature to cause at least one of a compressive force or a tensile force on the iron nitride-containing workpiece such that a strained state is preserved to provide a strained iron-nitride workpiece, wherein the at least one of the compressive force or the tensile force preserves strain in at least the portion of the strained iron nitride-containing workpiece comprising the at least one FeNphase domain.'}2. The method of claim 1 , wherein the first temperature is higher than the second temperature.3. The method of claim 1 , wherein claim 1 , upon ...

ASYMMETRICAL MAGNET ARRAYS

Magnet array structure includes a first linear magnet array having a plurality of consecutively arranged first Halbach arrays and a second linear magnet array having a plurality of consecutively arranged second Halbach arrays. The first linear magnet array, from a first end of the magnet array structure to a second end of the magnet array structure, having magnetic flux orientations rotating in a first direction, and the second linear magnet array, from the first end of the magnet array structure to the second end of the magnet array structure, having magnetic flux orientations rotating in a second direction that is opposite the first direction. The first linear magnet array is arranged parallel to the second linear magnet array so that, between the first and second ends of the magnet array structure, the first Halbach magnetic arrays are linearly offset from the second Halbach magnetic arrays. 1. A magnet array structure , comprising:a first linear magnet array comprising a plurality of consecutively arranged first Halbach arrays, the first linear magnet array, from a first end of the magnet array structure to a second end of the magnet array structure, having magnetic flux orientations rotating in a first direction; anda second linear magnet array comprising a plurality of consecutively arranged second Halbach arrays, the second linear magnet array, from the first end of the magnet array structure to the second end of the magnet array structure, having magnetic flux orientations rotating in a second direction that is opposite the first direction,wherein the first linear magnet array is arranged parallel to the second linear magnet array so that, between the first and second ends of the magnet array structure, the first Halbach magnetic arrays are linearly offset from the second Halbach magnetic arrays.2. The magnet array structure according to claim 1 , wherein each first Halbach magnetic array comprises a plurality of first magnetic elements and each second ...

Mechanical process for creating particles in a fluid

A method of producing at least one of microscopic and submicroscopic particles includes providing a template that has a plurality of discrete surface portions, each discrete surface portion having a surface geometry selected to impart a desired geometrical property to a particle while being produced; depositing a constituent material of the at least one of microscopic and submicroscopic particles being produced onto the plurality of discrete surface portions of the template to form at least portions of the particles; separating the at least one of microscopic and submicroscopic particles comprising the constituent material from the template into a fluid material, the particles being separate from each other at respective discrete surface portions of the template; and processing the template for subsequent use in producing additional at least one of microscopic and submicroscopic particles. A multi-component composition includes a first material component in which particles can be dispersed, and a plurality of particles dispersed in the first material component. The plurality of particles is produced by methods according to embodiments of the current invention.

CORE-SHELL PARTICLES, COMPOSITIONS INCORPORATING THE CORE-SHELL PARTICLES AND METHODS OF MAKING THE SAME

A low viscosity polysulfide sealant composition. The composition comprises a curable polysulfide polymer; a crosslinking agent; and a plurality of core-shell particles. The core-shell particles comprise: a core comprising a ferromagnetic material; and a shell comprising silica treated with an organic sulfur containing compound. The shell is capable of bonding with the polysulfide polymer. 1. A process for making core-shell particles , the process comprising:coating a ferromagnetic particle with a silica shell; andtreating the silica shell with an organic sulfur-containing compound to form a sulfur-containing moiety attached to the silica shell.2. The process of claim 1 , further comprising treating the ferromagnetic particle with a dispersant prior to coating.3. The process of claim 1 , wherein the organic sulfur containing compound is an alkoxy silane having at least one thiol group.4. The process of claim 1 , wherein the organic sulfur-containing compound is an alkoxy silane chosen from bis[3-(triethoxysilyl)propyl]tetrasulfide claim 1 , 3-mercaptopropyltrimethoxysilane claim 1 , 3-mercaptopropyltriethoxysilane claim 1 , or 3-mercaptopropylmethyldimethoxysilane.5. The process of claim 1 , further comprising modifying hydrophilic or hydrophobic properties of the core-shell particles.6. The process of claim 1 , wherein the core-shell particles have a primary particle size ranging from about 10 nm to about 1000 nm.7. The process of claim 1 , wherein the core-shell particles have a primary particle size ranging from about 50 nm to about 150 nm.8. The process of claim 1 , wherein the ferromagnetic particle comprises a ferromagnetic metal or ferromagnetic metal oxide.9. The process of claim 1 , wherein the ferromagnetic particle comprises at least one material chosen from FeO claim 1 , Fe claim 1 , Co claim 1 , or Ni.10. The process of claim 9 , wherein the organic sulfur-containing compound is an alkoxy silane having at least one thiol group.11. The process of claim 1 ...

METHOD OF PRODUCING AN OPPOSITELY MAGNETIZED MAGNETIC STRUCTURE

A method of producing an oppositely magnetized magnetic structure within or on a substrate material includes: 1. A method of producing a magnetic structure within or on a substrate material , comprising:producing a first number of cavities within or on the substrate material, and filling the first number of cavities with a first hard magnetic material exhibiting a first coercive field strength so as to generate a first hard magnetic arrangement;producing a second number of cavities within or on the substrate material, and filling the second number of cavities with a second hard magnetic material exhibiting a second coercive field strength, which is smaller than the first coercive field strength, so as to create a second hard magnetic arrangement;magnetizing the first and second hard magnetic arrangements in a first direction by means of a first magnetic field exhibiting a field strength which exceeds the first and second coercive field strengths;magnetizing the second hard magnetic arrangement in a second direction different from the first direction by means of a second magnetic field exhibiting a field strength which falls below the first coercive field strength but exceeds the second coercive field strength;wherein said magnetization of the second hard magnetic arrangement comprises exposing the first and second hard magnetic arrangements to the second magnetic field.2. The method as claimed in claim 1 , wherein the difference between the first and second coercive field strengths is more than 50%.3. The method as claimed in claim 1 , wherein the depths and/or the cross-sections of the first number of cavities for the first hard magnetic arrangement differ from the depths and/or the cross-sections of the second number of cavities for the second hard magnetic arrangement claim 1 , so that the magnetic field strengths of the individual magnets within the first and second hard magnetic arrangements following magnetization are identical in amount.4. The method as ...

Nickel ferrite nanoparticle composite and method for preparing same

The present invention relates to a method for preparing a nickel ferrite nanoparticle composite having an inverse spinel structure obtained using a polyol process, a nickel ferrite nanoparticle composite prepared by the method, and a method for selectively binding, separating or purifying a specific protein using the nickel ferrite nanoparticle composite. The method for preparing a magnetic nanoparticle composite according to the present invention includes a one-step hydrothermal synthesis process, and thereby the magnetic nanoparticle composite can be prepared in a simple and economic manner. Also, the nickel ferrite nanoparticles synthesized by the method of the present invention can be strongly magnetic, and also exist in the form of Ni 2+ in which Ni binds to a specific protein, thereby preventing loss of separability caused by additional oxidation and repeated recycling of the nanoparticles.

Method for producing magnetic material

Provided is a method for producing a magnetic material, the method including preparing a mixed phase material including a first magnetic metal phase formed from a magnetic metal and a second phase containing any one of oxygen (O), nitrogen (N) or carbon (C) and a non-magnetic metal, conducting a first heat treatment to the mixed phase material at a temperature of from 50° C. to 800° C., forming nanoparticle aggregates including a plurality of magnetic metal nanoparticles formed from the first magnetic metal phase and the second phase, and conducting a second heat treatment to the nanoparticle aggregates at a temperature of from 50° C. to 800° C. The nanoparticle aggregates are formed by decreasing an average particle size and a particle size distribution variation of the first magnetic metal phase after the first heat treatment.

AMPHIPHILIC MAGNETIC NANOPARTICLES AND AGGREGATES TO REMOVE HYDROCARBONS AND METAL IONS AND SYNTHESIS THEREOF

The present invention relates to a magnetic nanoparticle comprising: a) a core containing a ferromagnetic material; b) an outer coating containing a mixture of a lipophilic compound and a hydrophilic compound. The outer coating of the above particle makes the nanoparticle stable in water and, simultaneously, capable of adsorbing/emulsifying large amounts of hydrophobic/lipophilic compounds. The present invention further relates to a process for the preparation of the above- mentioned particles as well as their use in the removal of hydrocarbons from solid or liquid environments and metal ions from contaminated water (wastewater). 1. Magnetic nanoparticle comprising:a) a core containing a ferromagnetic material;b) an outer coating containing a mixture of at least one lipophilic compound and at least one hydrophilic compound, wherein said at least one lipophilic compound and said at least one hydrophilic compound are present in the outer coating in a molar ration comprised between 1:0.1 and 1:10.2. Nanoparticle according to claim 1 , wherein said ferromagnetic material is selected from magnetite claim 1 , maghemite claim 1 , barium ferrite claim 1 , cobalt ferrite claim 1 , nickel ferrite claim 1 , manganese ferrite claim 1 , strontium ferrite claim 1 , or zinc ferrite claim 1 ,3. Nanoparticle according to claim 1 , wherein said at least one lipophilic compound is selected from palmitoleic acid claim 1 , oleic acid claim 1 , erucic acid claim 1 , linoleic acid claim 1 , linolenic acid claim 1 , arachidonic acid claim 1 , and ricinoleic acid.4. Nanoparticle according to claim 1 , wherein said at least one hydrophilic compound is selected from a hydrophilic carboxylic acid or an alkaline or alkaline earth salt of a fatty acid containing a sulfonate group.5. Nanoparticle according to claim 4 , wherein said hydrophilic carboxylic acid is selected from methacrylic acid or a polymer thereof claim 4 , acrylic acid or a polymer thereof claim 4 , citric acid claim 4 , adipic ...

INTERNALLY SEGMENTED MAGNETS

An internally segmented magnet is disclosed. The magnet may include a first layer of a permanent magnetic material, a second layer of a permanent magnetic material, and an insulating layer separating the first and second layers. The insulating layer may include a ceramic mixture of at least a first ceramic material and a second ceramic material. The mixture having a melting point of up to 1,100° C. and may be a eutectic, or near eutectic, composition. The magnet may be formed by forming a first layer of powdered permanent magnetic material, depositing an insulating layer over the first layer, depositing a second layer of powdered permanent magnetic material over the insulating layer to form an internally segmented magnet stack, and sintering the magnet stack. The ceramic materials may include a halogen and an alkaline earth metal, alkali metal, or a metal having a +3 or +4 oxidation state. 1. An internally segmented magnet , comprising:a first layer of a permanent magnetic material;a second layer of a permanent magnetic material; andan insulating layer separating the first and second layers and including a ceramic mixture of at least a first ceramic material and a second ceramic material, the mixture having a melting point of up to 1,100° C.2. The magnet of claim 1 , wherein the first or second ceramic material includes a compound having a formula of AH claim 1 , where A is an alkaline earth metal and H is a halogen.3. The magnet of claim 2 , wherein the halogen is fluorine or chlorine and the alkaline earth metal is selected from the group consisting of magnesium (Mg) claim 2 , calcium (Ca) claim 2 , and strontium (Sr).4. The magnet of claim 1 , wherein the first or second ceramic material includes a compound having a formula of MH claim 1 , where M is a metal having a +3 oxidation state and H is a halogen.5. The magnet of claim 1 , wherein the first or second ceramic material includes a compound having a formula of BH claim 1 , where B is an alkali metal and H is ...

SEGMENTED PERMANENT MAGNETS

A segmented magnet is disclosed comprising first and second layers of permanent magnetic material and an insulating layer therebetween. The insulating layer may include a rare earth element and a ceramic mixture including at least first and second ceramic materials. The ceramic materials may include a halogen and an alkaline earth metal, alkali metal, or a metal having a +3 or +4 oxidation state. The rare earth element may comprise up to 30 wt. % of the insulating layer. The segmented magnet may be formed by applying the insulating layer to a first sintered permanent magnet layer, stacking a second sintered permanent magnet layer in contact with the insulating layer and spaced from the first sintered permanent magnet layer, and heating the formed magnet stack. The heating step may include annealing the magnet stack at an annealing temperature within 100° C. of the melting point of the ceramic mixture. 1. A segmented magnet , comprising:a first layer of permanent magnetic material;a second layer of permanent magnetic material; andan insulating layer separating the first and second layers and including a rare earth element and a ceramic mixture including at least first and second ceramic materials.2. The magnet of claim 1 , wherein the ceramic mixture has a melting point that is lower than a melting point of each of the first and second ceramic materials.3. The magnet of claim 1 , wherein the first or second ceramic material includes a compound having a formula of AH claim 1 , where A is an alkaline earth metal and H is a halogen.4. The magnet of claim 1 , wherein the first or second ceramic material includes a compound having a formula of MH claim 1 , where M is metal having a +3 oxidation state and H is a halogen.5. The magnet of claim 1 , wherein the first or second ceramic material includes a compound having a formula of BH claim 1 , where B is an alkali metal and H is a halogen.6. The magnet of claim 1 , wherein the ceramic mixture has a melting point that is ...

METHOD FOR PREPARATION OF VARIOUS CARBON ALLOTROPES BASED MAGNETIC ADSORBENTS WITH HIGH MAGNETIZATION

A process for the production of coating graphene, and other carbon allotropes, onto carbon-coated magnetic nanoparticles while maintaining high magnetic moment and adsorption properties is disclosed. 115.-. (canceled)16. A magnetic adsorbent composition comprisingferromagnetic particles anda coating of a carbon allotrope surrounding the ferromagnetic particles,wherein the composition is substantially free of iron oxides and iron carbides, and has magnetization of at least 20 emu/g.17. The composition according to claim 16 , wherein the carbon allotrope comprises at one least member selected from the group consisting of graphene claim 16 , graphene oxide claim 16 , graphite claim 16 , graphite oxide claim 16 , carbon fiber claim 16 , activated carbon and carbon nanotubes.18. The composition according to claim 17 , wherein the carbon allotrope comprises graphene.19. The composition according to claim 16 , wherein the composition has magnetization of at least 40 emu/g.20. The composition according to claim 16 , wherein the composition comprises particles having a particle size ranging from 40 to 500 nm. The present application claims benefit from earlier filed U.S. Provisional Application No. 61/793,408, filed Mar. 15, 2013, which is incorporated by reference in its entirety for all purposes.The present teachings are directed to methods of producing a carbon coated particle with both high magnetic moment and high adsorption capacity.There are a number of reports on the use of carbon-based magnetic adsorbents. Various carbon allotropes can be attached to magnetic particles to provide high capacity, and high surface areas adsorbents, and combined with magnetic particles allows for magnetic guided delivery of drugs or removal of various pollutions, such as oil, heavy metals, radionuclides, etc., upon adsorption. However, one of the common drawbacks of these materials is the relatively weak saturation magnetism, which is vital for removal of adsorbed pollutions or for ...

Composition

The present application relates to a composition, a 3D printing method using the same, and a three-dimensional shape comprising the same, and provides a composition capable of embodying a precise formation of a three-dimensional shape using a ceramic material and a uniform curing property of the three-dimensional shape. 1. A composition comprising ceramic particles , and magnetic particles having at least two magnetic domains , wherein the magnetic domains are irregularly arranged when an external magnetic field is absent and are magnetized by an external magnetic field.2. The composition according to claim 1 , wherein the magnetic particles surround the ceramic particles claim 1 , or the ceramic particles surround the magnetic particles claim 1 , whereby magnetic composites are formed.3. The composition according to claim 2 , further comprising second ceramic particles.4. The composition according to claim 3 , wherein the magnetic composites and the second ceramic particles are each comprised in a ratio of 1 to 20 parts by weight and 20 to 95 parts by weight.5. The composition according to claim 1 , wherein the ceramic particles comprise at least one oxide claim 1 , nitride or carbide selected from the group consisting of silicon (Si) claim 1 , aluminum (Al) claim 1 , titanium (Ti) and zirconium (Zr).6. The composition according to claim 1 , wherein the ceramic particles have an average particle size in a range of 0.1 μm to 5 μm.7. The composition according to claim 1 , wherein the magnetic particles have a coercive force in a range of 1 to 200 kOe.8. The composition according to claim 1 , wherein the magnetic particles have a saturation magnetization value at 25° C. in a range of 20 to 150 emu/g.9. The composition according to claim 1 , wherein the magnetic particles have an average particle size in a range of 20 to 300 nm.10. The composition according to claim 1 , wherein the magnetic domains have an average size in a range of 10 to 50 nm.11. The composition ...

MAGNETOELECTRIC EFFECT MATERIAL AND METHOD FOR MANUFACTURING SAME

The invention provides the Magnetoelectric Effect Material consisted of a single isotope, the alloy of isotopes, or the compound of isotopes. The invention applies enrichment and purification to increase the isotope abundance, to create the density of nuclear exciton by irradiation, and therefore increase the magnetoelectric effect of the crystal of single isotope, the alloy crystal of isotopes and the compound crystal of isotopes. The invention provides the manufacturing method including the selection rules of isotopes, the fabrication processes and the structure of composite materials. The invention belongs to the area of the nuclear science and the improvement of material character. The invention using the transition of entangled multiple photons to achieve the delocalized nuclear exciton. The mix of selected isotopes adjusts the decay lifetime of nuclear exciton and the irradiation efficiency to generate the nuclear exciton. 1. A magnetoelectric material , wherein the said material is made by isotope crystals , isotope alloy crystals or the compound crystals of particular isotope , which is enriched and/or purified to increase the purity of the said isotope , such that the crystal of the isotope , of the alloy isotopes , or of the chemical compound of isotopes to achieve the delocalized nuclear exciton for the magnetoelectric effects.2. The magnetoelectric material of claim 1 , wherein the enrichment of isotope in the magnetoelectric material applies the centrifugal process.3. The magnetoelectric material of claim 1 , wherein the purification of isotope in the magnetoelectric material applies the floating zone method to drive the impurities from inside to the edge of a sample by moving the local melting zone.4. The magnetoelectric material of claim 1 , wherein the isotope to generate the delocalized nuclear exciton in the magnetoelectric material has the transition from the first low-lying excited state to the ground state containing the quantum number change of ...

Iron oxide magnetic nanoparticle powder and method of producing the same, iron oxide magnetic nanoparticle thin film containing the iron oxide magnetic nanoparticle powder and method of producing the same

There is provided an iron oxide magnetic nanoparticle powder having a ferromagnetic property even if the particles have an average particle size of 15 nm or less, preferably 10 nm or less, and a method of producing the same, an iron oxide magnetic nanoparticle thin film containing the iron oxide magnetic nanoparticle powder and a method of producing the same, wherein the iron oxide magnetic nanoparticles having an ε-Fe 2 O 3 single phase, having the average particle size of 15 nm or less, and further 10 nm or less, are generated by using β-FeO(OH) (iron oxide hydroxide) nanoparticles as a starting material, and coating the (iron oxide hydroxide) nanoparticles with silicon oxide, and applying heat treatment thereto under an atmospheric air, and further the iron oxide magnetic nanoparticle thin film is obtained by using the iron oxide magnetic nanoparticles.

METHOD OF FORMING MICROSPHERE HAVING STRUCTURAL COLOR

Provided is a method of forming a microsphere having a structural color, which includes providing a composition for generating a structural color including a curable material and magnetic nanoparticles dispersed in the curable material, forming an emulsion by adding the composition for generating a structural color to an immiscible solvent, arranging the magnetic nanoparticles located in the emulsion droplet of the curable material in a one-dimensional chain structure by applying a magnetic field to the emulsion, and fixing the chain structure by curing the emulsion droplet. 1. A microsphere having a structural color comprising:a solid matrix; andmagnetic nanoparticles aligned in one-dimensional chain structures to exhibit a structural color within the solid matrix.2. The microsphere according to claim 1 , wherein the magnetic nanoparticles include a superparamagnetic material.3. The microsphere according to claim 1 , wherein the magnetic nanoparticles have a structure coated with a shell layer surrounding a core formed in a cluster of magnetic nanocrystals.4. The microsphere according to claim 3 , further comprising a solvation layer coating a surface of the magnetic nanoparticles.5. The microsphere according to claim 1 , wherein the microsphere contains an ordered structure of a photonic crystal due to alignment of the magnetic nanoparticles claim 1 , and a diffraction angle of light passing through the microsphere is changed with rotation of the microsphere.6. The microsphere according to claim 1 , wherein the microsphere is dispersed in a phase-changeable matrix.7. A display device comprising a microsphere rotated by an external magnetic field claim 1 ,wherein the microsphere contains an ordered structure of a photonic crystal due to alignment of magnetic nanoparticles, and a diffraction angle of light passing through the microsphere is changed with rotation of the microsphere.8. The display device according to claim 7 , wherein the magnetic nanoparticles ...

METHOD FOR ANALYZING COLOR CODE ENCODED IN MAGNETIC STRUCTURE

Provided is a color encoding method including providing a composition including a liquid medium and magnetic nanoparticles dispersed in the liquid medium; applying a magnetic field to the composition to align the magnetic nanoparticles; and applying a patterned energy source to the composition to solidify the composition, wherein more than one region of the composition are sequentially solidified with varying magnetic field strength to fix a plurality of color codes. 1. A color encoding method , comprising:providing a composition including a liquid medium and magnetic nanoparticles dispersed in the liquid medium;applying a magnetic field to the composition to align the magnetic nanoparticles; andapplying a patterned energy source to the composition to solidify the composition,wherein more than one region of the composition are sequentially solidified with varying magnetic field strength to fix a plurality of color codes.2. The method according to claim 1 , wherein the liquid medium includes a photocurable material.3. The method according to claim 1 , wherein the magnetic nanoparticles include superparamagnetic materials.4. The method according to claim 1 , wherein the magnetic nanoparticle is coated with a shell layer to improve dispersibility and solvation repulsion.5. The method according to claim 1 , wherein the composition further includes a hydrogen bonding solvent to form a solvation layer around the magnetic nanoparticles.6. The method according to claim 1 , wherein a structural color of a shorter wavelength region is generated as the magnetic field strength is increased.7. The method according to claim 1 , wherein the plurality of color codes includes at least one of information selected from the group consisting of a shape claim 1 , a position and a color.8. A method of manufacturing a color encoded magnetic structure claim 1 , comprising:filling a microfluidic channel with a composition including a curable material and magnetic nanoparticles dispersed in ...

MAGNETIC NANOCOMPOSITE COMPOSITIONS

Superparamagnetic nanocomposites are provided. In an embodiment, a superparamagnetic nanocomposite comprises a superparamagnetic core comprising a first, soft superparamagnetic ferrite and a superparamagnetic shell comprising a second, soft superparamagnetic ferrite, the shell formed over the core, wherein the first and second soft superparamagnetic ferrites are different compounds and have different magnetocrystalline anisotropies. 1. A superparamagnetic nanocomposite comprising a superparamagnetic core comprising a first , soft superparamagnetic ferrite and a superparamagnetic shell comprising a second , soft superparamagnetic ferrite , the shell formed over the core , wherein the first and second soft superparamagnetic ferrites are different compounds and have different magnetocrystalline anisotropies.2. The superparamagnetic nanocomposite of claim 1 , wherein a sample of nanoparticles composed of the first claim 1 , soft superparamagnetic ferrite and having an average diameter of 12 nm provides a magnetization-field loop exhibiting no hysteresis at room temperature and a single-peaked zero-field cooling curve having a blocking temperature of less than room temperature.3. The superparamagnetic nanocomposite of claim 1 , wherein the first and second soft superparamagnetic ferrites are independently selected from FeOand soft superparamagnetic ferrites according to formula M′M″FeO claim 1 , wherein M′ and M″ are different and are independently selected from Mn claim 1 , Ni claim 1 , Mg claim 1 , and Zn and 0≤x≤1.4. The superparamagnetic nanocomposite of claim 1 , wherein the first and second soft superparamagnetic ferrites are independently selected from FeO claim 1 , MnFeO claim 1 , and ZnMFeO claim 1 , wherein 0.1 Подробнее

MAGNETIC RECORDING MEDIUM

A magnetic recording medium includes a support, a recording layer, and a protective layer provided on at least one surface of the support and containing plate-shaped particle powder. The plate-shaped particle powder is stacked in an overlapping manner in a thickness direction of the protective layer such that main surfaces of plate-shaped particles face a surface of the support, and the plate-shaped particles have an average plate ratio of 60 or more. 1. A magnetic recording medium comprising:a support;a recording layer; anda protective layer provided on at least one surface of the support and containing plate-shaped particle powder, whereinthe plate-shaped particle powder is stacked in an overlapping manner in a thickness direction of the protective layer such that main surfaces of the plate-shaped particles face a surface of the support, andthe plate-shaped particles have an average plate ratio of 60 or more.2. The magnetic recording medium according to claim 1 , wherein the plate-shaped particles have an average plate ratio of 200 or more.3. The magnetic recording medium according to claim 1 , wherein a ratio (Dm/Tm) of an average thickness Dm of the protective layer to an average plate thickness Tm of the plate-shaped particles is 30 or more.4. The magnetic recording medium according to claim 1 , wherein the protective layer is provided on a surface opposite to the recording layer of both surfaces of the support.5. The magnetic recording medium according to claim 1 , wherein the protective layer is provided on both surfaces of the support.6. The magnetic recording medium according to claim 1 , wherein the plate-shaped particles are made of clay.7. The magnetic recording medium according to claim 6 , wherein the clay is at least one selected from the group consisting of kaolinite claim 6 , dickite claim 6 , halloysite claim 6 , chrysotile claim 6 , lizardide claim 6 , amesite claim 6 , pyrophyllite claim 6 , talc claim 6 , montmorillonite claim 6 , beidellite ...

System and method for perturbing a permanent magnet asymmetric field to move a body

A system and method for perturbing a permanent magnet asymmetric field to move a body includes a rotating body configured to rotate about a rotation axis, a permanent magnet arrangement arranged on the rotating body containing two or more permanent magnets, and a perturbation element. The permanent magnet arrangement is configured such that an asymmetric magnetic field is generated by the permanent magnets about a perturbation point. Actuation of the perturbation element at or near the perturbation point causes a tangential magnetic force on the rotating body and/or the permanent magnet arrangement, thereby causing the rotating body to rotate about the rotation axis. The disclosure may also be used for linear motion of a body.

PLASMONIC-MAGNETIC BIFUNCTIONAL NANOTUBES FOR BIOLOGICAL APPLICATIONS

The present invention includes nanotubes or rods, methods and arrays using plasmonic-magnetic bifunctional nanotubes or rods comprising: one or more silica nanotubes or rods; one or more nanomagnets embedded in a portion of the silica nanotubes or rods; and plasmonic metal nanoparticles uniformly coating in or on at least a portion of the surface of the nanomagnets and the silica nanotubes surface-coated. 149-. (canceled)50. A plasmonic-magnetic bifunctional nanocapsule comprising:a silica nanotube having a metallic rod embedded therein; andmetallic nanoparticles coated on a surface of the silica nanotube.51. The nanocapsule of claim 50 , wherein the silica nanotube shell thickness is from 70 nm to 150 nm.52. The nanocapsule of claim 50 , wherein the nanocapsule has a diameter from 100 nm to 0.01 cm.53. The nanocapsule of claim 50 , wherein the metallic nanoparticles comprise at least one of silver claim 50 , gold claim 50 , cobalt claim 50 , rhodium claim 50 , iridium claim 50 , copper claim 50 , platinum claim 50 , or palladium.54. The nanocapsule of claim 50 , wherein the metallic rod comprises nickel claim 50 , platinum claim 50 , silver claim 50 , gold.55. The nanocapsule of claim 50 , wherein the metallic rod consists of nickel.56. The nanocapsule of claim 50 , wherein the metallic rod is a segmented metallic rod.57. The nanocapsule of claim 56 , wherein the segmented metallic rod comprises segments of silver or gold claim 56 , and segments of nickel58. The nanocapsule of claim 50 , wherein the metallic nanoparticles are coated on the outer surface of the silica nanotube.59. The nanocapsule of claim 58 , wherein the entire outer surface of the silica nanotubes is coated with metallic nanoparticles.60. The nanocapsule of claim 50 , wherein a portion of the silica nanotube is hollow.61. The nanocapsule of claim 60 , wherein the metallic nanoparticles are coated on the outer and the inner surface of the silica nanotube.62. The nanocapsule of claim 50 , wherein ...

Magnetoelectric control of superparamagnetism

A magnetoelectric composite device having a free (i.e. switchable) layer of ferromagnetic nanocrystals mechanically coupled a ferroelectric single crystal substrate is presented, wherein application of an electrical field on the composite switches the magnetic state of the switchable layer from a superparamagnetic state having no overall net magnetization to a substantially single-domain ferromagnetic state.

Magnetic film having wireless charging radiator condition, method of manufacturing the same, and wireless charging device using the same

Since the magnetic film of the present invention has a much thinner thickness compared to a corresponding conventional magnetic layer and radiator coil material assembly and has no adhesive layer or air layer between the magnetic layer and the radiator, permeability required at the time of charging can be improved, a loss rate can be reduced and high charging efficiency can be obtained, Furthermore, since a band width and a gain rate can be improved, the magnetic film can be very usefully applied to wireless charging products which pursue slimming in design.

MAGNETIC PARTICLES

A magnetic particle is disclosed. The magnetic particle comprises a magnetic material having a maximum field strength in a range of from about 20 emu/g to about 250 emu/g and a remanence in a range of from about 0 emu/g to about 30 emu/g. The magnetic particle further comprises an outer surface containing a ligand. The ligand interacts with an analyte of interest in the sample solution. 1. A composition of matter for processing or analyzing a sample solution , the composition of matter comprising:a population of magnetic particles having an average diameter in a range of from about 100 nm to about 100 μm, a maximum field strength in a range of from about 20 emu/g to about 250 emu/g, a remanence in a range of from about 0 emu/g to about 30 emu/g, and an outer surface containing a ligand, wherein the ligand interacts with an analyte of interest in the sample solution; anda reagent for processing or analyzing the sample according to a desired analytical method.2. The composition of matter of claim 1 , wherein the magnetic particles comprise ferrimagnetic material.3. The composition of matter of claim 1 , wherein the reagent comprises a precipitating reagent to selectively precipitate the analyte of interest in the sample solution.4. The composition of matter of claim 3 , wherein the precipitating reagent comprises polyethylene glycol.5. The composition of matter of claim 3 , wherein the ligand comprises a carboxyl group.6. The composition of matter of claim 3 , wherein the maximum field strength is in a range of from about 35 emu/g to about 100 emu/g.7. The composition of matter of claim 3 , wherein the remanence is in a range of from about 0 emu/g to about 10 emu/g.8. A method of processing a sample claim 3 , the method comprising:providing a population of magnetic particles, each particle having a ligand attached to an outer surface of the particle, wherein the ligand interacts with an analyte of interest in the sample, the population of magnetic particles having an ...

ELECTROMAGNETIC MATERIAL AND INDUCTANCE FOR LOW TEMPERATURES

An electromagnetic material for an inductance for operation at cryogenic temperatures including, in an electrically insulating matrix, metal nanoparticles with superparamagnetic behavior of size less than or equal to 30 nm and having a magnetic permeability greater than or equal to 1.5 for a frequency between 5 GHz and 50 GHz. 1. An electromagnetic material for an inductance operating at cryogenic temperatures comprising , in an electrically insulating matrix , metal nanoparticles with superparamagnetic behavior of size less than or equal to 30 nm and having a magnetic permeability greater than or equal to 1.5 for a frequency between 5 GHz and 50 GHz.2. The electromagnetic material according to claim 1 , wherein each particle inscribe in a cube or parallelepiped of size less than or equal to 20 nm.3. The electromagnetic material according to claim 1 , wherein each particle inscribes in a cube or parallelepiped of size less than or equal to 10 nm.4. The electromagnetic material according to claim 1 , wherein the magnetic permeability of each particle is greater than 3.5. The electromagnetic material according to claim 1 , wherein the matrix is a polymer.6. The electromagnetic material according to claim 1 , wherein the matrix is a metal oxide.7. The electromagnetic material according to claim 1 , wherein the matrix is a graphene oxide.8. The electromagnetic material according to claim 1 , wherein the particles comprise iron claim 1 , cobalt claim 1 , nickel claim 1 , and/or an alloy of these metals.9. The electromagnetic material according to claim 8 , wherein the particles are iron carbides or nitrides such as FeC claim 8 , FeC claim 8 , FeN claim 8 , FeN claim 8 , FeN.10. The electromagnetic material according to claim 1 , wherein the particles are covered with a protective surface layer of inorganic or organic material such as graphene claim 1 , graphite claim 1 , amorphous carbon claim 1 , metal oxide or polymer.11. An inductive element comprising an ...

SYSTEM AND METHOD FOR PERTURBING A PERMANENT MAGNET ASYMMETRIC FIELD TO MOVE A BODY

A system and method for perturbing a permanent magnet asymmetric field to move a body includes a rotating body configured to rotate about a rotation axis, a permanent magnet arrangement arranged on the rotating body containing two or more permanent magnets, and a perturbation element. The permanent magnet arrangement is configured such that an asymmetric magnetic field is generated by the permanent magnets about a perturbation point. Actuation of the perturbation element at or near the perturbation point causes a tangential magnetic force on the rotating body and/or the permanent magnet arrangement, thereby causing the rotating body to rotate about the rotation axis. The disclosure may also be used for linear motion of a body. 1. A permanent magnet asymmetric field system for moving a body , comprising:a rotating body configured to rotate about a rotation axis;a permanent magnet arrangement arranged on the rotating body containing three permanent magnets; anda perturbation element;wherein the permanent magnet arrangement is configured such that an asymmetric magnetic field is generated by the permanent magnets about a perturbation point;wherein two of the three permanent magnets are polarized in a first direction and one of the three permanent magnets is polarized in a second direction, the first direction being perpendicular to the second direction;wherein actuation of the perturbation element at or near the perturbation point with an input force causes a tangential magnetic output force on the rotating body or the permanent magnet arrangement, thereby causing the rotating body to rotate about the rotation axis; andwherein the actuation of the perturbation element causes a perturbation of the asymmetric field causing a release of potential energy from the permanent magnet arrangement to create the output force causing the rotation.2. The permanent magnet asymmetric field system according to claim 1 , wherein the perturbation element comprises a ferrous material.3. ...

Fixtures and Methods for Forming Aligned Magnetic Cores

Magnetic cores and method and fixtures for forming the same are disclosed. The magnetic core may comprise a magnetic body including magnetic grains and a magnetic flux path, the magnetic grains aligned in a plurality of distinct directional alignments to conform to the magnetic flux path. The grain orientation of the cores may be provided by fixtures including electrical circuits and/or permanent magnets. The fixtures may be configured to produce magnetic fields that approximate, mimic, or correspond to a magnetic flux path in the magnetic core, once it is consolidated and in use. The magnetic fields may orient the grains of the magnetic core when they are in an unconsolidated state, such that the grains are aligned in a plurality of directional alignments that approximate, mimic, or correspond to a magnetic flux path in the magnetic core. 1. A magnetic core comprising:a magnetic body including magnetic grains and a magnetic flux path, the magnetic grains aligned in a plurality of distinct directional alignments to conform to the magnetic flux path.2. The magnetic core of claim 1 , wherein each alignment is a major alignment with respect to the magnetic body.3. The magnetic core of claim 1 , wherein the magnetic body has an inner cavity.4. The magnetic core of claim 3 , wherein the plurality of directional alignments extend around a perimeter of the inner cavity.5. The magnetic core of claim 4 , wherein the magnetic core is an inductor core.6. The magnetic core of claim 1 , wherein the magnetic core is a stator core including a plurality of stator teeth and a plurality of stator slots between the stator teeth.7. The magnetic core of claim 6 , wherein the plurality of directional alignments include a plurality of arc-shaped alignments from one stator tooth to another stator tooth around a stator slot.8. The magnetic core of claim 1 , wherein the magnetic core is a rotor core including a plurality of permanent magnets disposed therein.9. The magnetic core of claim 8 , ...

NANO MAGNETO-RHEOLOGICAL FLUID AND PREPARATION METHOD AND DEVICE THEREOF

A nano magneto-rheological fluid, comprising nano-scale magnetizable magnetic particles, wherein an average particle size or a minimum size in one dimension is less than 100 nanometers; and fluids used as carrier liquids, wherein the magnetic particles are dispersively distributed in the fluids. An apparatus for making the nanometric magnetorheological fluid including a ball mill, a settling separator located downstream of the ball mill for receiving the primary magnetic particles, a magnetic separator located downstream of and connected to the settling separator for receiving the upper layer of fluid containing fine magnetic particles, and an agitator for mixing the desired secondary magnetic particles with a carrier liquid and an additive. A method for making the nano magneto-rheological fluid wherein the nano magneto-rheological fluid has performance advantages such as no remanent magnetization, non-settlement, low viscosity, low abrasive rate for components, long service life, high reliability and fast and clear response. 1. A nanometric magnetorheological fluid , comprising:nanometric magnetizable magnetic particles, wherein the magnetic particles have an average particle size or a minimum unidimensional size of less than 100 nanometers; anda fluid for use as a carrier liquid, wherein the magnetic particles are dispersed in the fluid.2. The nanometric magnetorheological fluid according to claim 1 , wherein the magnetizable magnetic particles are magnetically anisotropic magnetic particles claim 1 , wherein the magnetic particles have an average particle size or a minimum unidimensional size of less than 99 nanometers; and wherein the magnetic particles are dispersedly distributed in the fluid in a state that is not prone to settle.3. The nanometric magnetorheological fluid according to claim 2 , wherein the magnetic particles have an average particle size or a minimum unidimensional size between 0.1 and 80 nanometers claim 2 , wherein the number of magnetic ...

Formulations for the synthesis of paramagnetic particles and methods that utilize the particles for biochemical applications

A set of paramagnetic particles synthesized by co-precipitation methods wherein an alkaline hydroxide solution is mixed with a metal salt solution. The alkaline hydroxide features ammonium hydroxide, potassium hydroxide, sodium hydroxide, or mixtures thereof. The metal salt solution features at least one ferrous salt and at least one tetravalent metal salt selected from Group 4 elements of the Periodic Table. The concentration of the ferrous salt is equal to or greater than the concentration of the tetravalent metal salt. The paramagnetic particles may be used for bioprocessing via magnetic fields. Bioprocessing, for example, may include purifying, concentrating, or detecting biomolecules of interest (e.g., nucleic acids, carbohydrates, peptides, proteins, other organic molecules, cells, organelles, microorganisms, viruses, etc.), or other magnetic field-based processes common to applications in separation science, diagnostics, molecular biology, protein chemistry, and clinical practice.

FUNCTIONALIZED MAGNETIC PARTICLE COMPOSITIONS AND RELATED METHODS

The disclosure relates to functionalized magnetic particle compositions and related methods to extract biological target analytes such as bacteria from samples such as clinical, industrial, or environmental samples. The functionalized magnetic particles can be synthesized in a one-pot method and include a biomimetic binding pair member which permits non-specific binding to one or more biological target analytes, such as when using the functionalized magnetic particles to extract pathogens or other analytes from a sample matrix. The functionalized magnetic particle composition generally includes a magnetic particle core, and a binding pair member bound to an external surface of the magnetic particle core, where the binding pair member is capable of non-specific binding to a plurality of biological target analytes. 1. A functionalized magnetic particle composition comprising:(a) a magnetic particle core; and(b) a biomimetic binding pair member bound to an external surface of the magnetic particle core, the binding pair member comprising a N-acetylglucosamine moiety and being capable of non-specific binding to a plurality of biological target analytes.2. The composition of claim 1 , wherein the magnetic particle core comprises at least one of Fe(II) and Fe(III).3. The composition of claim 1 , wherein the binding pair member comprises at least one of a glycan and glycoconjugate.4. (canceled)5. The composition of claim 1 , wherein the binding pair member further comprises at least one of a N-acetylgalactosamine moiety claim 1 , a N-acetylneuraminic acid moiety claim 1 , a glucose moiety claim 1 , a galactose moiety claim 1 , a fucose moiety claim 1 , a mannose moiety claim 1 , a rhamnose moiety claim 1 , a glucuronic acid moiety claim 1 , a galacturonic acid moiety claim 1 , an arabinofuranose acid moiety claim 1 , and a xylose moiety.6. The composition of claim 1 , wherein the binding pair member comprising the N-acetylglucosamine moiety comprises one or more of ...

SUPERCONDUCTING ELECTROMAGNETIC WAVE SENSOR

An electromagnetic sensor for use in a variety of applications requiring extremely high sensitivity, such as measuring power and characteristics of incident electromagnetic radiation includes a superconducting layer that carries an exchange field for providing a spin splitting effect of charge carriers in the superconducting layer, a metal electrode, and an insulating layer arranged between the superconducting layer and metal electrode to form a spin filter junction therebetween. The electromagnetic sensor provides an antenna including a wave collecting element, in contact with the superconducting layer to convey thereinto external electromagnetic waves that are generated by an external source. An electric measurement device provides an output signal responsive to the amplitude and frequency of the external electromagnetic waves, and contacts the metal electrode to measure an electric current or voltage caused by the spin splitted charge carrier flow from the superconducting layer through the spin filter junction into the metal electrode. 1. An electromagnetic sensor comprising:a superconducting layer arranged to carry an exchange field for providing a spin splitting effect of charge carriers in said superconducting layer;a metal electrode;an insulating layer arranged between said superconducting layer and said metal electrode, in such a way to form a spin filter junction between said superconducting layer and said metal electrode;an antenna comprising a wave collecting element arranged in contact with said superconducting layer to convey into said superconducting layer external electromagnetic waves collected by said antenna and generated by an external source, said electromagnetic waves having an amplitude and a frequency; andan electric measurement device, arranged in contact with said metal electrode and configured to measure an electric current or voltage caused by said spin splitted charge carrier flow from said superconducting layer through said spin filter ...

Method For Obtaining A Material With Giant Magnetocaloric Effect By Ion Irradiation

The present invention concerns, in particular, a method for obtaining a product with magnetocaloric effect from a single piece of material having a magnetic phase transition, the method comprising irradiation of at least one part of the material with ions, the irradiation being carried out with a suitable flux so that, after the irradiation, the material has various magnetic phase transition temperatures in the various parts of the material. 1. Method for obtaining a magnetocaloric product from a single piece of material having a magnetic phase transition , the method comprising irradiating at least part of the material with ions , wherein said irradiating is conducted with a fluence adapted so that the material has , after said irradiating , different magnetic phase transition temperatures in different parts of the material.2. Method according to claim 1 , wherein the single piece of material has a first-order magnetic phase transition.3. Method according to claim 1 , wherein the fluence is adapted so that the magnetic phase transition temperature of the material varies by at least 0.5 kelvin between two different parts of the material.4. Method according to claim 1 , wherein the fluence is adapted so that the material has claim 1 , after said irradiating claim 1 , a maximum difference in the magnetic phase transition temperatures of the different parts of the product of value within the range of 0.5 to 150 kelvins.5. Method according to claim 1 , wherein the fluence is adapted so that the magnetic phase transition temperature of the material varies claim 1 , after said irradiating claim 1 , monotonously from a first part of the material to a second part of the material.6. Method according to claim 1 , wherein the fluence is adapted so that the magnetic phase transition temperature of the material varies claim 1 , after said irradiating claim 1 , continuously from a first part of the material to a second part of the material.7. Method according to claim 1 , wherein ...

MAGNETIC SURFACES AND USES THEREOF

Modified surfaces of the present disclosure include a surface or substrate material, a magnetic field, which may be generated through the use of a magnet placed at a distance beneath the surface or substrate, or placed above the surface or substrate, or through the use of a magnetic surface or substrate, and a magnetic fluid, such as quereferrofluid or ferrogel, deposited in a layer on the top of the surface or substrate. The modified surfaces may be icephobic. In addition, a droplet of liquid placed on the modified surface can be manipulated through placement of a local heat source in proximity to the droplet, without contacting the droplet. 1. A magnetic surface comprising:a substrate having an upper surface;a layer of magnetic fluid located on the upper surface of the substrate; anda magnet located beneath the substrate, wherein the magnet produces a magnetic field that contacts the layer of magnetic fluid.2. The magnetic surface of claim 1 , wherein the magnetic fluid is ferrofluid.3. The magnetic surface of claim 1 , wherein the layer of magnetic fluid has a thickness of about 10 nm to about 10 mm.4. The magnetic surface of claim 1 , wherein the magnetic field has a strength of about 1 mT to about 10 T.5. A magnetic surface comprising:a substrate;a magnet located above the substrate, wherein the magnet has an upper surface; anda layer of magnetic fluid located on the upper surface of the magnet, wherein the magnet produces a magnetic field that contacts the layer of magnetic fluid.6. The magnetic surface of claim 5 , wherein the magnetic fluid is ferrofluid.7. The magnetic surface of claim 5 , wherein the layer of magnetic fluid has a thickness of about 10 nm to about 10 mm.8. The magnetic surface of claim 5 , wherein the magnetic field has a strength of about 1 mT to about 10 T.9. A magnetic surface comprising:a magnetic substrate having an upper surface; anda layer of magnetic fluid located on the upper surface of the magnetic substrate, wherein the magnetic ...

Magnetic-photoconductive material, magneto-optical data storage device, magneto-optical data storage system, and light-tunable microwave components comprising a photoconductive-ferromagnetic device

The present invention concerns a magnetic-photoconductive material including orientable magnetic moments or spins, the material being configured to generate photo-carriers permitting to orientate or re-orientate the magnetic moments or spins at a material temperature less than the Curie Temperature (T C ) or Curie point.

Remotely addressable magnetic composite micro-actuators

The present invention describes methods to fabricate actuators that can be remotely controlled in an addressable manner, and methods to provide remote control such micro-actuators. The actuators are composites of two permanent magnet materials, one of which is has high coercivity, and the other of which switches magnetization direction by applied fields. By switching the second material's magnetization direction, the two magnets either work together or cancel each other, resulting in distinct “on” and “off” behavior of the devices. The device can be switched “on” or “off” remotely using a field pulse of short duration.

METHOD OF SYNTHESIZING MAGNETITE/MAGHEMITE CORE/SHELL NANOPARTICLES

The method of synthesizing magnetite/maghemite core/shell nanoparticles is a modified co-precipitation method for producing iron oxide (FeO/γ-FeO) nanoparticles that allows for production of the FeO/γ-FeOcore/shell nanoparticles with a desired shell thickness ranging between about 1 nm to 5 nm for biomedical and data storage applications. Aqueous solutions of ferric and ferrous salts are mixed at room temperature and pH of the mixture is raised to 10. The mixture is then heated at 80° C. for different lengths of time at atmospheric pressure to adjust particle size, and the precipitate is dried at 120° C. in vacuum. Oxidation in an oxygen atmosphere for different lengths of time is used to adjust the thickness of the γ-FeOshell. 1. A method of synthesizing magnetite/maghemite (FeO/γ-FeO) core/shell nanoparticles , comprising the steps of:mixing an aqueous solution of a ferric salt with an aqueous solution of a ferrous salt;adding ammonium hydroxide solution to the mixture until the pH of the mixture is 10;maintaining the mixture at a temperature of 80° C. exposed to atmospheric oxygen at atmospheric pressure for between one hour and three hours to form a precipitate; and{'sub': 3', '4', '2', '3, 'drying the precipitate to yield FeO/γ-FeOcore/shell nanoparticles.'}2. The method of synthesizing magnetite/maghemite (FeO/γ-FeO) core/shell nanoparticles as recited in claim 1 , wherein the step of mixing the aqueous solutions comprises mixing an aqueous solution of FeCl.6HO and an aqueous solution of FeCl.4HO at room temperature.3. The method of synthesizing magnetite/maghemite (FeO/γ-FeO) core/shell nanoparticles as recited in claim 1 , wherein the step of adding the ammonium hydroxide solution comprises adding the ammonium hydroxide solution in dropwise manner until the mixture has a pH of 10.4. The method of synthesizing magnetite/maghemite (FeO/γ-FeO) core/shell nanoparticles as recited in claim 1 , wherein the step of drying the precipitate comprises drying the ...

Magnetic microspheres for use in fluorescence-based applications

Microspheres, populations of microspheres, and methods for forming microspheres are provided. One microsphere configured to exhibit fluorescent and magnetic properties includes a core microsphere and a magnetic material coupled to a surface of the core microsphere. About 50% or less of the surface of the core microsphere is covered by the magnetic material. The microsphere also includes a polymer layer surrounding the magnetic material and the core microsphere. One population of microspheres configured to exhibit fluorescent and magnetic properties includes two or more subsets of microspheres. The two or more subsets of microspheres are configured to exhibit different fluorescent and/or magnetic properties. Individual microspheres in the two or more subsets are configured as described above.

HARVESTING MICRO ALGAE

A reusable composite paramagnetic particle may comprise a paramagnetic core encased by a protective material to which is grafted a tendril layer comprising a plurality of polymeric chains. The polymeric chains may be designed to interact with a microorganism. The interaction between the microorganism and the polymeric chain may be electrostatic. The nanoparticle may be used in a method to isolate or recover microorganisms from solutions using an externally applied magnetic field. 1. A composite particle comprising:a core;a protective shell encasing said core; anda tendril layer, further comprising a plurality of polymeric chains attached to the protective shell.2. The composite particle of claim 1 , wherein the core further comprises a paramagnetic material.3. The composite particle of claim 2 , wherein the paramagnetic material comprises iron oxide.4. The composite particle of claim 3 , wherein the core material comprises FeO.5. The composite particle of claim 3 , wherein the core material comprises FeO.6. The composite particle of claim 1 , wherein the protective shell comprises silica.7. The composite particle of claim 1 , wherein the polymeric chains are hydrophilic.8. The composite particle of claim 7 , wherein the polymeric chains have a net positive charge.9. The composite particle of claim 7 , wherein the polymeric chains have a net negative charge.10. The composite particle of claim 7 , wherein the polymeric chains have no net charge.11. A method of recovering a microorganism from a solution comprising:providing a microorganism in a solution;adding a composite paramagnetic particle, wherein the composite particle has a silica encased iron oxide core, and polymeric chains grafted to the silica;allowing the composite particles to be suspended in the solution;waiting sufficient time to allow the composite particles and microorganisms to interact;applying an external magnetic field to the solution; andrecovering the composite particles and microorganism ...

TWO-DIMENSIONAL MATERIALS INTEGRATED WITH MULTIFERROIC LAYERS

The invention relates to heterostructures including a layer of a two-dimensional material placed on a multiferroic layer. An ordered array of differing polarization domains in the multiferroic layer produces corresponding domains having differing properties in the two-dimensional material. When the multiferroic layer is ferroelectric, the ferroelectric polarization domains in the layer produce local electric fields that penetrate the two-dimensional material. The local electric fields can influence properties of the two-dimensional material, including carrier density, transport properties, optical properties, surface chemistry, piezoelectric-induced strain, magnetic properties, and interlayer spacing. Methods for producing the heterostructures are provided. Devices incorporating the heterostructures are also provided, including tunable sensors, optical emitters, and programmable logic gates. 1. A heterostructure comprising:a multiferroic material layer; anda two-dimensional material layer provided on the multiferroic material layer,wherein the multiferroic material layer comprises an array of polarization domains in the multiferroic layer, and produces corresponding domains in the two-dimensional material.2. The heterostructure of claim 1 , wherein the multiferroic material layer is a ferroelectric material layer.3. The heterostructure of claim 2 , wherein the ferroelectric polarization domains in the ferroelectric material layer produce local electric fields that penetrate the two-dimensional material layer.4. The heterostructure of claim 3 , wherein the local electric fields modify properties of the corresponding domains in the two-dimensional material.5. The heterostructure of claim 4 , wherein the properties are selected from the group consisting of carrier density claim 4 , transport properties claim 4 , optical properties claim 4 , surface chemistry claim 4 , piezoelectric-induced strain claim 4 , magnetic properties claim 4 , and interlayer spacing.6. The ...

PARTICLES

A coated magnetic particle comprising an optionally porous magnetic polymer particle of a matrix polymer, said polymer particle having on a surface and/or in the pores thereof superparamagnetic crystals, said coated particle having a coat formed of a coating polymer, wherein said coated magnetic particle is essentially non-autofluorescent. 131-. (canceled)32. A composition comprising a non-autofluorescent coated magnetic polymer particle comprising:a porous matrix polymer particle comprising superparamagnetic crystals on the surface and in the pores thereof, wherein majority of the superparamagnetic crystals are within pores of the porous matrix polymer particle, and wherein the porous matrix polymer particle is essentially free of conjugated delocalised electron systems other than those found in benzene rings; anda coat of a coating polymer wherein the coating polymer is formed by the polymerization of coating monomers wherein the coating monomers are essentially free of conjugated delocalised electron systems other than those found in benzene rings, wherein the coated magnetic polymer particle is essentially non-autofluorescent,wherein the coated magnetic polymer particle has a coefficient of variation (CV) of less than 10%, andwherein the coated magnetic polymer particle has a level of autofluorescence corresponding to a difference in the Mean Grey Value (ΔMGV) at an excitation wavelength of 450±25 nm for an exposure time of 500 ms or 600 ms of less than 600.33. The non-autofluorescent coated magnetic polymer particle of claim 32 , further surface functionalized with a functional group essentially free of conjugated delocalised electron systems other than those found in benzene rings.34. The non-autofluorescent coated magnetic polymer particle of claim 33 , wherein the functional group is selected from a sulphonic acid claim 33 , a carboxylic acid claim 33 , an amine claim 33 , or an epoxy group.35. The non-autofluorescent coated magnetic polymer particle of ...

POLYMER-ENCAPSULATED MAGNETIC NANOPARTICLES

Magnetic particles () have a particle size () of 500 nm or less and include a core () and a polymer coating () that surrounds and encapsulates the core (). The core () includes a metal, metal alloy, or metal oxide of at least one metal such as B, Mg, Al, Mn, Co, Ni, Cu, Fe Sm, Yb, Dy, Gd or Er and Nb. The magnetic core () is a polycrystalline particle and is a superspin glass magnetic material, having a coercivity greater than zero and a magnetic remenance greater than zero at room temperature. Above room temperature and at low field, the magnetic moment of these superspin glass magnetic materials increases with temperature. An in situ hydrolysis/precipitation method from precursor metal salts is used to form the polymer-encapsulated magnetic particles (). 1. Magnetic particles comprising:a magnetic core and a polymer coating;wherein the magnetic core comprises a metal, metal alloy, or metal oxide of at least one metal selected from the group consisting of B, Mg, Al, Mn, Co, Ni, Cu, Fe, Nb, Sm, Ln, Yb, Dy, Gd or Er;wherein the magnetic core comprises poly crystalline particles which are superparamagnetic and which are coalesced to form a superspin glass magnetic core;wherein the polymer coating surrounds the magnetic core;and wherein the magnetic particles exhibit coercivity greater than zero and less than 300 Oe and magnetic remenance greater than zero and less than 12 emu/g at room temperature;wherein the magnetic particle has a particle size of 500 run or less.2. The magnetic particles of wherein the poly crystalline particles of the magnetic core are the same crystalline phase.3. The magnetic particles of wherein the magnetic moment of the magnetic particle increases as the temperature increases above room temperature.4. The magnetic particles of claim 1 , wherein the particles comprise a saturation magnetization greater than 50 and less than 100 emu/g at room temperature.5. The magnetic particles of claim 1 , wherein the polycrystalline particles which have ...