A method for fabricating masters for imprint lithography and related imprint process

CONTINUOUS-WAVE PUMPED COLLOIDAL NANOCRYSTAL LASER

Laser device characterized in that it comprises, as gain medium, a film of colloidal nanocrystals of semiconductor material, wherein said nanocrystals are two-dimensional nanocrystals suitable for forming quantum wells for confinement of the charge carriers in the nanocrystals and having a biexciton gain mechanism. 1. Laser device comprising a film of colloidal nanocrystals of semiconductor material as a gain medium , wherein said nanocrystals are two-dimensional nanocrystals forming quantum wells for confinement of charge carriers in the nanocrystals and having a biexciton gain mechanism , the device being characterized in that said nanocrystals are adapted to provide strong confinement of the charge carriers in a thickness direction (z) of the nanocrystal and weak or no confinement of the charge carriers in each of two mutually orthogonal lateral directions (x , y) of the nanocrystal , orthogonal to the thickness direction (z).2. Device according to claim 1 , wherein the nanocrystals have a thickness comprised in the range of 1-5 nm.3. Device according to claim 1 , wherein the nanocrystals have a core/shell structure comprising a core part and a shell part of different semiconductor materials claim 1 , wherein the core part has a thickness comprised in the range of 1-5 nm.4. Device according to claim 1 , wherein the nanocrystals are of semiconductor selected from the group consisting of selenides claim 1 , sulphides and tellurides of elements of groups I claim 1 , II claim 1 , III claim 1 , IV and V claim 1 , and their core/shell structures.5. Device according to claim 4 , wherein the nanocrystals further contain atomic dopants in a concentration of less than 10%.6. Device according to claim 1 , wherein the film of colloidal two-dimensional nanocrystals is arranged in a resonant cavity having a photonic gap which overlaps the emission peak of the colloidal two-dimensional nanocrystals.7. Device according to claim 1 , further comprising a continuous-wave optical ...

A PROCESS FOR PROVIDING HYDROREPELLENT PROPERTIES TO A FIBROUS MATERIAL AND THEREBY OBTAINED HYDROPHOBIC MATERIALS

Process for the preparation of titanium dioxide with nanometric dimensions and controlled shape

The present invention relates to an industrial applicable process for the preparation of materials with nanometric dimensions and controlled shape, based on titanium dioxide. The invention also relates to a process for the preparation of titanium dioxide nanorods with anatase phase composition, which are highly suitable for applications involving photovoltaic cells, particularly Dye Sensitized Solar Cells (DSSC), photoelectrolysis cells and tandem cells for the conversion of solar energy and the production of hydrogen.

process of treating a fibrous material to render the material hydrophobic and/or water repellent, and fibrous material

Technique for stabilizing solutions of titanium dioxide nanoparticles in acrylate polymers by means of short-pulsed uv laser irradiation

A method for preparing a colloid solution of titanium dioxide nanoparticles in a solution of acrylic resin in organic solvent includes mixing titanium dioxide nanoparticles with a solution of acrylic resin in organic solvent, so as to obtain the colloid solution. The colloid solution is subjected to a stabilization treatment suitable for preventing or reducing nanoparticle aggregation, the treatment includes irradiating the colloid solution with pulsed coherent light having a wavelength substantially comprised in the ultraviolet absorption band of the titanium dioxide nanoparticles.

OCTAPOD SHAPED NANOCRYSTALS AND USE THEREOF

This invention relates to the controlled growth of uniform octapod-shaped colloidal nanocrystals and use thereof. These octapod-shaped nanocrystals can be applied in many fields of technology. This represents the first approach reported so far for the predictable and controlled fabrication of octapod-shaped nanocrystals. The synthesis approach is applicable to a broad range of materials, such as group II-VI semiconductor nanocrystals but is not limited to these materials. Using several cation exchange and oxidation procedures, we also demonstrate in this application that extremely uniform octapod-shaped nanocrystals of other materials can be synthesized, including various semiconductors, metals and insulators. 2. The process according to claim 1 , wherein the nanocrystal seeds comprise a material selected from:{'sub': 2', '2-x', '2-x', '1-y', 'y', '2', '2.86', '2', '2', '2', '2', '2', '2', '3', '4', '9', '8', '4', '2', '2', '2', '1-y', 'y', '1-y', 'y', '1-x', 'x', '2', '3', '2', '3', '4', '2', '4', '4', '8', '1.33', '2', 'x', '1-x', 'x', '1-x', '0.4', '3.6', '4', 'x', '1-x', '2', '2', '0.2', '2.56', '4', '3, 'A group IV semiconductor, a group III-V semiconductor, a IV-VI semiconductor, a II-VI semiconductor, a single-element material, a multi-metallic material, an oxide of one or more elements, or one material not comprised in the above groups and being selected from CuSe, CuSe, CuSeS, CuS, CuTe, AgSe, AgSe, AgS, AgTe, CoSe, CoSe, CoS, CoTe, CoSe, CoS, ZnSO, SeS, MnSe, MnSe, MnS, MnSe, MnTe, MnSSe, MnSeTe, SiC (3C), SiGe, CuInGaSe, ZnAs, LiNbO, LaCuO, GaSe, GaSe, MnInAS, CdMnTe, MnPbTe, CuInGaSe, CuInSe, AgGaS, YF.'}3. The process according to claim 2 , wherein the nanocrystal seeds consist of CdSe in the cubic sphalerite phase having octahedral claim 2 , cuboctahedral or truncated octahedral shape.4. The process according to claim 1 , wherein the growth precursors for the pods are chemical species generating one of the following material: a group IV semiconductor ...

METHOD OF SYNTHESIZING BRANCHED GOLD NANOPARTICLES HAVING CONTROLLED SIZE AND BRANCHING

A method of synthesizing branched gold nanoparticles is described, starting from an aqueous solution of gold nanoparticle spherical seeds, which is subjected to a growth treatment with an aqueous solution comprising hydroxylamine or a salt thereof as a reducing agent and 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES) as an agent that directs the shape of the nanostructure, and by subsequent addition of an aqueous solution of chloroauric acid (HAuCl4). The structural features and the properties of the branched gold nanoparticles obtained by the method of the invention are also described. 1. A method of synthesizing branched gold nanoparticles by seed-mediated growth , comprising the steps of:a) providing an aqueous solution of gold nanoparticle spherical seeds; andb) subjecting the gold nanoparticle spherical seeds to a growth treatment, characterized in that it comprises:{'sub': '1', 'b) treating the aqueous solution of gold nanoparticle spherical seeds with an aqueous solution comprising hydroxylamine or a salt thereof as a reducing agent and 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES) as an agent that directs the shape of the said nanoparticles; and'}{'sub': '2', 'b) adding an aqueous solution comprising aurate ions, thereby obtaining branched gold nanoparticles by the controlled growth of branches on the surface of the gold nanoparticle spherical seeds.'}2. The method according to claim 1 , wherein the hydroxylamine salt is hydroxylamine hydrochloride or hydroxylamine sulfate.3. The method according to claim 1 , wherein the aqueous solution of step b) comprises a gold salt.4. The method according to claim 3 , wherein the gold salt is tetrachloroauric acid (HAuCl).5. The method according to claim 1 , wherein the gold nanoparticle spherical seeds claim 1 , before being subjected to the growing treatment of step b) claim 1 , are grown in size by a preventive treatment with an HEPES-free aqueous solution of a reducing agent and subsequent ...

PROCESS FOR PROVIDING HYDROREPELLENT PROPERTIES TO A FIBROUS MATERIAL AND THEREBY OBTAINED HYDROPHOBIC MATERIALS

Process for treating a fibrous material, to make said material hydrophobic and/or water-repellent, comprising the operation of impregnating said material with a suspension comprising nanoparticles of a hydrophobic material and a cyanoacrylate in an organic solvent and causing the crosslinking of said cyanoacrylate; the process uses an amount of cyanoacrylate and a weight ratio with the nanoparticles such as to produce complete or partial coating of the fibrous material with a matrix of crosslinked cyanoacrylate in which said nanoparticles are dispersed. 1. Process of treating a fibrous material , to make the material hydrophobic and/or water repellent , characterized in that it includes the operation of impregnating said material with a suspension comprising nanoparticles of a hydrophobic material and a cyanoacrylate in an organic solvent and causing crosslinking of said cyanoacrylate , the concentration of the cyanoacrylate in said suspension and its weight ratio relative to said nanoparticles being such as to produce complete or partial coating of the fibrous material with a matrix of crosslinked cyanoacrylate in which said nanoparticles are dispersed.2. Process according to claim 1 , characterized in that said cyanoacrylate is an alkylcyanoacrylate claim 1 , in which the alkyl has from 1 to 8 carbon atoms claim 1 , or a mixture of said alkylcyanoacrylates.3. Process according to claim 1 , characterized in that said hydrophobic material is selected from fluorinated polymers claim 1 , natural or synthetic waxes claim 1 , polymers or copolymers of α-olefins or of cycloolefins and polymers of polymethylsiloxane.4. Process according to claim 1 , characterized in that said hydrophobic material is a wax claim 1 , selected from carnauba wax claim 1 , paraffin wax claim 1 , beeswax claim 1 , polyethylene waxes claim 1 , polypropylene waxes and Fischer-Tropsch waxes.5. Process according to claim 1 , characterized in that said hydrophobic material is polytetrafluoroethylene ...

Magnetic actuators having a nanocomposite membrane

Magnetic actuators are provided having a substrate, a membrane layer directly or indirectly applied on a surface of the substrate, in which the membrane layer consists of a matrix of elastic polymer material, in which nanoparticles of magnetic material, capable of undergoing a dynamic effect under the action of a magnetic field, are dispersed, and at least one magnetic field generator suitable to generate a magnetic field acting on the membrane layer, in which the magnetic field generator is directly or indirectly arranged on the surface of the substrate, or within the substrate.

Polymeric composite materials with antimicrobial and biodegradable properties and uses thereof

A composite material for the production of a medical device having an antiseptic action includes a matrix of alginate in which the complex of iodopovidone is dispersed. The composite material is used particularly for the production of films, micro-capsules, and suture threads with iodine controlled release.

METHODS OF MAKING FERRITE NANOCRYSTALS

Methods of making iron-based ferrite nanocrystals are provided. In such methods the ferrite may include iron oxides and iron/cobalt or iron/manganese mixed salts. The method may include thermal decomposition of one or more precursors of the ferrite, consisting of an organic salt of the metal or metals constituting the ferrite of interest, comprising the operation of heating a solution comprising said precursor(s) in the presence of a surfactant and of a non-aqueous organic solvent comprising an ether, at temperature sufficient to cause thermal decomposition of said precursor, wherein the solvent may further comprise a saturated or unsaturated, linear or branched aliphatic hydrocarbon, liquid at temperatures above 45° C. and having a boiling point above the boiling point of the ethereal solvent. 114-. (canceled)15. A method of making iron-based ferrite nanocrystals comprisingselecting one or more iron-based ferrite precursorsheating the one or more precursor in a solution comprising said one or more precursor, a ligand, and at least two organic solvents to a temperature sufficient to cause thermal decomposition of said one or more precursorwherein the iron-based ferrite is selected from the group consisting of iron oxides, mixed salts of iron/cobalt, iron/manganese and combinations thereof,wherein the ligand comprises saturated or unsaturated aliphatic acids and aliphatic amines, andwherein the at least two organic solvents each comprise an ether and a linear or branched, saturated or unsaturated aliphatic hydrocarbon having from 18 to 36 carbon atoms, are liquid at room temperature and have a boiling point temperature higher than the boiling point of the ethereal solvent.16. The method of claim 15 , wherein one of the at least two different solvents comprises a saturated aliphatic hydrocarbon claim 15 , having a boiling temperature above 298° C.17. The method of claim 15 , wherein the aliphatic hydrocarbon comprises squalane.18. The method of claim 15 , wherein at ...

Ordered superstructures of octapod-shaped nanocrystals, their process of fabrication and use thereof

This invention relates to the controlled realization of ordered superstructures of octapod-shaped colloidal nanocrystals, formed either in the liquid phase or on a solid substrate. These structures can be applied in many fields of technology.

Optical and atomic force microscopy integrated system for multi-probe spectroscopy measurements applied in a wide spatial region with an extended range of force sensitivity

An optical and atomic force microscopy measurement integrated system is described. The system has an atomic force microscope having a first probe configured to interact with a sample to be analysed, an optical tweezer, a second probe configured to be held in the focus of the optical tweezer, movement means for moving the two probes, measurement means for measuring the variations of position of the two probes and processing means configured to receive, as an input, the measurement signals of the two probes to generate an output signal representative of the sample.

METHODS FOR THE PRODUCTION OF POLY(CYANOACRYLATE) FIBERS

Methods are provided for the production of poly(cyanoacrylate) micro- or nanofibers which include mixing the cyanoacrylate monomer with a dipolar aprotic solvent to form a poly(cyanoacrylate) gel, dissolving the gel in a solvent for acrylates to form a solution suitable for electrospinning, and submitting the solution thus obtained to electrospinning to form said micro- or nanofibers. The micro- or nanofibers thus obtained can be used to form coatings that adhere to a substrate as a result of thermal treatment. 19-. (canceled)10. A method for the production of micro- or nanofibers of poly(cyanoacrylate) , comprising:mixing the cyanoacrylate monomer with a dipolar aprotic solvent to form a poly(cyanoacrylate) gel;dissolving the gel in a solvent for acrylates to form a solution suitable for electrospinning, andsubjecting the resulting solution to electrospinning in order to form said micro- or nanofibers.11. The method of claim 10 , wherein said dipolar aprotic solvent is selected from the group consisting of: dimethyl sulphoxide claim 10 , dimethylformamide claim 10 , dimethyl acetamide claim 10 , N-methyl-2-pyrrolidone and mixtures thereof.12. The method of claim 10 , wherein said dipolar aprotic solvent and the cyanoacrylate monomer are mixed in a ratio ranging from 0.1:1 to 2:1.13. The method of claim 10 , wherein said poly(cyanoacrylate) gel is dissolved in a solvent selected from the group consisting of: acetonitrile claim 10 , acetone claim 10 , chlorinated hydrocarbon solvents claim 10 , C-Ccarboxylic acids and mixtures thereof.14. The method of claim 10 , wherein said dipolar aprotic solvent is dimethyl sulphoxide and the solvent for electrospinning in which the gel is dissolved is selected from acetone and acetonitrile.15. The method of claim 10 , wherein said cyanoacrylate monomer is a C-Calkyl-cyanoacrylate.16. A method for the production of a polymeric coating of poly(cyanoacrylate) claim 10 , which comprises micro- or nanofibers formed by the method of ...

Process for producing a hydrophobic composite bioelastomer comprising starch

Process for producing a hydrophobic composite bioelastomer, comprising a cross-linked bioelastomer matrix in which an organic phase is dispersed, comprising the reaction of cross-linking of a hydroxyl-terminated polysiloxane with a silane coupling agent, comprising an acetoxysilane, to obtain a cross-linked polysiloxane with release of acetic acid. The reaction of cross-linking is carried out in the presence of starch to cause at least partial in situ acetylation by the acetic acid released from said starch that is incorporated in the cross-linked bioelastomer matrix.

METHODS FOR THE COLLOIDAL SYNTHESIS OF LITHIUM IRON PHOSPHATE

Methods for producing lithium iron phosphate or lithium manganese phosphate or lithium iron manganese phosphate, by colloidal synthesis are provided. Such methods include the operation of reacting a lithium salt, an iron(II) halide (and/or a manganese(II) halide) and a phosphorus compound, which, under the reaction conditions, is capable of releasing the phosphate ion, in the presence of an organic surfactant or a mixture of organic surfactants including an alkylamine or alkenylamine, in which the surfactant or mixture of surfactants is capable of dissolving the lithium salt and the iron halide (and/or the manganese halide), where used, in an organic solvent, which is liquid at room temperature, in which the surfactant or mixture of surfactants is soluble, the reaction being performed at a temperature not lower than 250° C. 115-. (canceled)16. A method for the production of lithium iron phosphate , lithium manganese phosphate or lithium iron manganese phosphate , through colloidal synthesis , comprising the step of reacting a lithium salt , an iron (II) halide and/or a manganese (II) halide and a phosphorus compound which , under the reaction conditions , is capable of releasing the phosphate ion , in the presence of an organic surfactant or mixture of organic surfactants comprising an alkyl- or alkenyl-amine having from 14 to 20 carbon atoms , wherein said surfactant or mixture of surfactants is capable of dissolving the lithium salt and the iron halide and/or the manganese (II) halide , where used , in an organic solvent which is liquid at room temperature and in which said surfactant or mixture of surfactants is soluble , the reaction being conducted at a temperature not lower than 250° C.17. The method of claim 16 , wherein said lithium salt is selected from the group consisting of: acetate claim 16 , carbonate claim 16 , hydroxide and a halide claim 16 , said halide being selected from the group consisting of chloride claim 16 , bromide and iodide.18. The ...

DEVICE AND METHOD FOR DETERMINING THE DISSOLUTION KINETICS OF COLLOIDAL NANOPARTICLES

A device is described for determining the dissolution kinetics of colloidal nanoparticles in respective derivation ions in a solution, which comprises a dissolution compartment containing the solution, and feedable with the colloidal nanoparticles; an analysis compartment separate from the dissolution compartment; a fixed filtering membrane which separates the dissolution compartment from the analysis compartment, is selectively permeable to the derivation ion and is adapted to filter the solution; compressing means to induce passage of the solution from the dissolution compartment to the analysis compartment through the filtering membrane; a determination device for determining the quantity of the derivation ion; the device furthermore comprises mixing means associated to the dissolution compartment and distinct from the compressing means and the filtering membrane has pores of size smaller than 10 nm. Relative determination methods for determining the dissolution kinetics and the toxicity of colloidal nanoparticles are also described. 1. A device for determining the dissolution kinetics of colloidal nanoparticles into respective derivation ions in a solution comprising:a dissolution compartment feedable with said solution and with said colloidal nanoparticles;an analysis compartment separate from said dissolution compartment;a fixed filtering membrane which separates said dissolution compartment from said analysis compartment, is selectively permeable to the derivation ion and is adapted to filter said solution;compressing means actuatable so as to induce the passage of said solution from said dissolution compartment to said analysis compartment through said filtering membrane; anda determination device for determining the amount of said derivation ion; characterised by also comprising mixing means associated to said dissolution compartment, adapted to mix said solution, and distinct from said compressing means, and in that said filtering membrane has pores of ...

Methods for the production of biodegradable plastics material from cellulose plant wastes

Methods for the production of a biodegradable plastics material obtained from plant waste materials are provided which include the steps of dissolving plant waste material in an anhydrous solvent which includes anhydrous trifluoroacetic acid in order to dissolve a cellulose fraction of the material, the waste material being at least partly dehydrated in such a way that its water content is not likely to cause hydrolysis of the cellulose fraction, and removing the solvent from the solution containing the non-hydrolysed cellulose fraction.

Process For Encapsulating A Liquid

Globular microstructures comprising a liquid core and a solid shell that envelops the core comprising polymeric micro- or nanofibres, preferably obtained by electrospinning, comprising a hydrophobic polymer or a mixture of hydrophobic polymer with polymers derived from cellulose or with polyacrylates; the microstructures may have a further coating of nanoparticles or polymeric coating. The microstructures have applications similar to those of “liquid marbles” with improved mechanical properties.

Heat-Sensitive Nanoparticle System

A heat-sensitive system comprising at least one nanoparticle bound covalently to at least one thermolabile molecule comprising an azo —N═N— functional group —N═N— in turn bound covalently to at least one active molecule selected from a fluorophore molecule and a drug is disclosed. The system converts an electromagnetic radiation into thermal energy exposed to an alternating magnetic field. Uses of the system are also disclosed. 1. A heat sensitive system comprising at least one nanoparticle able to convert an electromagnetic radiation into thermal energy when said nanoparticle is exposed to an alternating magnetic field , said nanoparticle being bound covalently with at least one thermolabile molecule , said thermolabile molecule being covalently bound with at least one active molecule selected from a fluorophore molecule and a drug , wherein said thermolabile molecule comprises an azo —N═N— functional group.2. The system as claimed in claim 1 , wherein said thermolabile molecule is selected from the group consisting of (2 claim 1 ,2′-Azobis[N-(2-carboxyethyl)-2-methylpropionamide]hydrate) claim 1 , (2 claim 1 ,2′-Azobis[2-methyl-N-(2-hydroxyethyl)propionamide) claim 1 , 2 claim 1 ,2′-Azobis(2-methylpropionamidine)dihydrochloride claim 1 , 2 claim 1 ,2′-Azobis{2-[1-(2-hydroxyethyl)-2-imidazoline-2-yl]propane}dihydrochloride claim 1 , 2 claim 1 ,2′-Azobis{2-[1-(2-hydroxyethyl)-2-imidazoline-2-yl]propane}dihydrochloride claim 1 , 2-(4-hydroxyphenylazo)benzoic acid claim 1 , 4-(4-hydroxy-phenylazo)-benzoic acid claim 1 , 4 claim 1 ,4′-Azobis(4-cyanovaleric acid).3. The system as claimed in claim 1 , wherein said nanoparticle is a paramagnetic nanoparticle at ambient temperature.4. The system as claimed in claim 1 , wherein said nanoparticle is produced in a material selected from iron oxide and a ferrite.5. The system as claimed in claim 1 , wherein said covalent bond between said nanoparticle and said thermolabile molecule is obtained by a spacer.6. The system as ...

PROCEDURE FOR THE TREATMENT OF FIBROUS MATERIALS TO OBTAIN WATER-REPELLENT PROPERTIES, HYDROPHOBIC FIBROUS MATERIALS AND ITEMS THAT INCLUDE THEM OBTAINED

Device and method for determining the dissolution kinetics of colloidal nanoparticles

A device (1) is described for determining the dissolution kinetics of colloidal nanoparticles (2) in respective derivation ions (3) in a solution (4), which comprises a dissolution compartment (5) containing the solution (4), and feedable with nhe colloidal nanoparticles (2); an analysis compartment (6) separate from the dissolution compartment (5); a fixed filtering membrane (7) which separates the dissolution compartment (5) from the analysis compartment (6), is selectively permeable to the derivation ion (3) and is adapted to filter the solution (4),· compressing means (8) to induce passage of the solution (4) from the dissolution compartment (5) to the analysis compartment (6) through the filtering membrane (7); a determination device (9) for determining the quantity of the derivation ion (3); the device furthermore comprises mixing means (io) associated to the dissolution compartment (5) and distinct from the compressing means (8) and the filtering membrane (7) has pores of size smaller than 10 nm. Relative determination methods for determining the dissolution kinetics and the toxicity of colloidal nanoparticles (2) are also described.

Fluorescent colloidal nanocapsules, a process for their production and use in cells selection assays.

A method for the preparation of magnetic fluorescent nanobeads, comprising and an amphiphilic polymer shell and a core having magnetic properties; said nanobeads comprise a core having superparamagnetic behaviour, including an aggregate of ferromagnetic or ferromagnetic nanoparticles and comprising the steps of: a) providing colloidal nanoparticles, covered by a surfactant, said nanoparticles having such size as to show superparamagnetic properties at room-temperature (or anyhow at the temperature of nanobeads use); b) adding a solution of amphiphylic polymer to a solution of said particles in a solvent to obtain a mixture of said superparamagnetic nanoparticles and polymer; c) adding a solvent wherein said nanoparticles arc insoluble and the used polymer is only partially soluble to the mixture obtained in b).

A process for providing hydrorepellent properties to a fibrous material and thereby obtained hydrophobic materials

Process for treating a fibrous material, to make said material hydrophobic and/or water-repellent, comprising the operation of impregnating said material with a suspension comprising nanoparticles of a hydrophobic material and a cyanoacrylate in an organic solvent and causing the crosslinking of said cyanoacrylate; the process uses an amount of cyanoacrylate and a weight ratio with the nanoparticles such as to produce complete or partial coating of the fibrous material with a matrix of crossliiiked cyanoacrylate in which said nanoparticles are dispersed.

Electroactive device based on organic compounds, comprising a float-glass substrate

An electroactive photonic device (D) comprises a substrate ( 1 ), at least one cathode layer ( 2 ), at least one anode layer ( 4 ), and at least one layer of active material ( 3 ) based on organic compounds and interposed at least partially between the anode and cathode layers ( 2, 4 ). The layers ( 2, 3, 4 ) are arranged on the substrate ( 1 ) in a predetermined configuration such that the device (D) can convert luminous energy into electrical energy or vice versa. The substrate ( 1 ) is made of float glass.

Device for controlling fluid motion into micro/nanochannels by means of surface acoustic waves

A device for controlling fluid motion in a micro/nanofluidic structure of channels by means of surface acoustic waves is described. The device comprises a structured volume of material bearing a predetermined configuration of micro/nanofluidic channels for holding and transferring amounts of fluids adapted to define at least one fluid inlet and at least one fluid outlet and presenting a hydrophobic behaviour for the fluids to be handled and a substrate made of material with piezoelectric properties coupled to the micro/nanofluidic channels.

Heat-sensitive nanoparticle system

The present invention concerns a heat-sensitive system comprising at least one nanoparticle bound covalently to at least one thermolabile molecule comprising an azo -N=N- functional group -N=N- in turn bound covalently to at least one active molecule selected from a fluorophore molecule and a drug. The system of the invention is able to convert an electromagnetic radiation into thermal energy exposed to an alternating magnetic field. Uses of the system according to the invention are also provided.

Process for the synthesis of stimulus-responsive magnetic nanoparticles

Process for preparing magnetic nanoparticles coated with a thermo- or Ph-responsive polymer, characterized in that it comprises the radical polymerization of a monomer or co-monomers susceptible of forming a thermo-polymer or Ph-responsive copolymer in a solution including magnetic nanoparticles functionalized at their surface with a polymerization initiator of formula (I): wherein: R 3 is hydrogen or hydroxyl, Hal is a halogen selected from bromine, chlorine and iodine, m is an integer from 1 to 10, preferably from 1 to 3, and R 1 and R 2 , independently of one another, are selected from hydrogen, methyl and phenyl. The coated particles are useful, particularly as carriers of a drug in therapeutic treatments by hyperthermia and/or in situ release of the drug.

A process for providing hydrorepellent properties to a fibrous material and thereby obtained hydrophobic materials

Process for treating a fibrous material, to make said material hydrophobic and/or water-repellent, comprising the operation of impregnating said material with a suspension comprising nanoparticles of a hydrophobic material and a cyanoacrylate in an organic solvent and causing the crosslinking of said cyanoacrylate; the process uses an amount of cyanoacrylate and a weight ratio with the nanoparticles such as to produce complete or partial coating of the fibrous material with a matrix of crossliiiked cyanoacrylate in which said nanoparticles are dispersed.

INTEGRATED TRIASSIAL MAGNETIC SENSOR DEVICE.

Method and microdevice to identify and/or quantify analytes in biological samples

A method and device, based on a film of a luminescent substance, such as colloidal semiconductor nanocrystals dispersed in a polymer matrix, for conducting quantitative and real-time analyses of PCR processes or of biomolecular interactions in genomics and/or proteomics. The optical detection system is based on FRET processes between the luminescent substance (which acts as the donor in the FRET process) and a suitable fluorophore (which acts as the acceptor species) with which the DNA or other biomolecule is marked. The device is essentially composed of a reaction microchamber with a wall formed by a thin film made of polymer material, in which the nanocrystals are uniformly dispersed, or made of a photoluminescent or electroluminescent polymer. Molecular probes are chemically immobilized on the surface of the polymer film for the specific recognition of the analyte which is to be determined in real time. The film of nanocrystals is excited by radiation at low wavelength (for example, UV/blue), and the radiation in the spectral emission window characteristic of the fluorescent marker of the biomolecule is detected. The specific photophysical characteristics of FRET processes make it possible to monitor in a selective way, in real time and in quantitative mode, the biomolecular interactions, which take place in the close proximity of the surface of the film (typically at distances of < 10 nanometres), thus almost completely reducing possible interference caused by background signals and by the free biomolecules in solution (which have not interacted with the corresponding recognition sites). The characteristics of the device also enable simultaneous analyses to be conducted in parallel on different biomolecules (multiplexing).

Electrical transduction method and device for the detection of biorecognition events in biomolecular interaction processes for genome/proteome analysis

A method is described for detecting biorecognition events in biomolecular interaction processes, including the provision, on at least one biorecognition site, of molecular probes (P) adapted to interact with target molecular species (T) which are coupled to conductive nanoparticles (NP), in which the probes (P) are associated with a nanojunction transducer device (12) comprising a pair of conductive electrodes (22, 24) separated by a nanometric gap of the same order of magnitude as the dimensions of said conductive nanoparticles (NP), adapted to detect a condition of coupling between at least one molecular probe (P) and a specimen of a target species (T) which interact with each other. A biorecognition event includes the coupling of a probe (P) to at least one specimen of the target species (T) and results in the positioning of the conductive nanoparticle (NP) coupled to the target species (T) (by being directly conjugated with the latter or with a signal molecule which can interact with it) between the electrodes (22, 24) of the nanojunction device (12), with the consequent creation of a conductive path between the electrodes. The occurrence of biorecognition events is evaluated according to the intensity of the current which is made to flow between the electrodes (22, 24) of the nanojunction device (12) by the application of a potential difference.

Electrical transduction method and device for the detection of biorecognition events in biomolecular interaction processes for genome/proteome analysis

A method is described for detecting biorecognition events in biomolecular interaction processes, including the provision, on at least one biorecognition site, of molecular probes (P) adapted to interact with target molecular species (T) which are coupled to conductive nanoparticles (NP), in which the probes (P) are associated with a nanojunction transducer device (12) comprising a pair of conductive electrodes (22, 24) separated by a nanometric gap of the same order of magnitude as the dimensions of said conductive nanoparticles (NP), adapted to detect a condition of coupling between at least one molecular probe (P) and a specimen of a target species (T) which interact with each other. A biorecognition event includes the coupling of a probe (P) to at least one specimen of the target species (T) and results in the positioning of the conductive nanoparticle (NP) coupled to the target species (T) (by being directly conjugated with the latter or with a signal molecule which can interact with it) between the electrodes (22, 24) of the nanojunction device (12), with the consequent creation of a conductive path between the electrodes. The occurrence of biorecognition events is evaluated according to the intensity of the current which is made to flow between the electrodes (22, 24) of the nanojunction device (12) by the application of a potential difference.

Method of synthesizing branched gold nanoparticles having controlled size and branching

A method of synthesizing branched gold nanoparticles is described, starting from an aqueous solution of gold nanoparticle spherical seeds, which is subjected to a growth treatment with an aqueous solution comprising hydroxylamine or a salt thereof as a reducing agent and 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES) as an agent that directs the shape of the nanostructure, and by subsequent addition of an aqueous solution of chloroauric acid (HAuCl4). The structural features and the properties of the branched gold nanoparticles obtained by the method of the invention are also described.

Funktionalisierte thiophenoligomere und ihre verwendung als fluoreszenzmarker

Integrierter magnetischer 3d sensor

Albumin nanoparticles encapsulating gadolinium and method of synthesis thereof

Process for producing a hydrophobic composite bioelastomer comprising starch

Process for producing a hydrophobic composite bioelastomer, comprising a cross-linked bioelastomer matrix in which an organic phase is dispersed, comprising the reaction of cross-linking of a hydroxyl-terminated polysiloxane with a silane coupling agent, comprising an acetoxysilane, to obtain a cross-linked polysiloxane with release of acetic acid. The reaction of cross-linking is carried out in the presence of starch to cause at least partial in situ acetylation by the acetic acid released from said starch that is incorporated in the cross-linked bioelastomer matrix.

Processo para produção de um compósito bio-elastômero hidrofóbico e compósito bio- elastômero

processo para produção de um bi o-elastômero composto hidrofóbico e bi o-elastômero composto. é descrito um processo para a produção de um bio-elastômero composto hidrofóbico que compreende uma matriz de bio-elastômero de ligação cruzada, na qual uma fase orgânica é dispersa, compreendendo a reação de ligação cruzada de um polissiloxano terminado por hidroxila com um agente de acoplamento de silano compreendendo um acetoxissilano, para obter um polissiloxano de ligação cruzada, com liberação de ácido acético. a reação de ligação cruzada é realizada na presença de amido para provocar acetilação in situ, pelo menos parcial, pelo ácido acético liberado a partir do referido amido que está incorporado na matriz de bio-elastômero de ligação cruzada.

Process for producing a hydrophobic composite bioelastomer comprising starch

Method for the gram-scale preparation of cubic ferrite nanocrystals for biomedical applications

Process for the preparation of titanium dioxide with nanometric dimensions and controlled shape

The present invention relates to an industrial applicable process for the preparation of materials with nanometric dimensions and controlled shape, based on titanium dioxide. The invention also relates to a process for the preparation of titanium dioxide nanorods with anatase phase composition, which are highly suitable for applications involving photovoltaic cells, particularly Dye Sensitized Solar Cells (DSSC), photoelectrolysis cells and tandem cells for the conversion of solar energy and the production of hydrogen.

Polymeric composite materials with antimicrobial and biodegradable properties and uses thereof

A composite material for the production of a medical device having an antiseptic action, consisting of or comprising a matrix of alginate in which the complex of iodopovidone is dispersed. The composite material is used particularly for the production of films, micro- capsules, and suture threads with iodine controlled release.

Continuous-wave pumped colloidal nanocrystal laser

A technique for stabilizing solutions of titanium dioxide nanoparticles in acrylate polymers by means of short-pulsed uv laser irradiation

Method for preparing a colloid solution of titanium dioxide nanoparticles in a solution of acrylic resin in organic solvent, comprising: mixing titanium dioxide nanoparticles with a solution of acrylic resin in organic solvent, so as to obtain the aforementioned colloid solution. The colloid solution is subjected to a stabilization treatment suitable for preventing or reducing nanoparticle aggregation, the treatment comprising: irradiating the colloid solution with pulsed coherent light having a wavelength substantially comprised in the ultraviolet absorption band of the titanium dioxide nanoparticles.

Tecnica di stabilizzazione di soluzioni di nanoparticelle di diossido di titanio in polimeri acrilati tramite irradiamento uv con laser ad impulsi brevi

A technique for stabilizing solutions of titanium dioxide nanoparticles in acrylate polymers by means of short-pulsed uv laser irradiation

A technique for stabilizing solutions of titanium dioxide nanoparticles in acrylate polymers by means of short-pulsed uv laser irradiation

Method for preparing a colloid solution of titanium dioxide nanoparticles in a solution of acrylic resin in organic solvent, comprising: mixing titanium dioxide nanoparticles with a solution of acrylic resin in organic solvent, so as to obtain the aforementioned colloid solution. The colloid solution is subjected to a stabilization treatment suitable for preventing or reducing nanoparticle aggregation, the treatment comprising: irradiating the colloid solution with pulsed coherent light having a wavelength substantially comprised in the ultraviolet absorption band of the titanium dioxide nanoparticles.

Technique for stabilizing solutions of titanium dioxide nanoparticles in acrylate polymers by means of short-pulsed UV laser irradiation

A method for preparing a colloid solution of titanium dioxide nanoparticles in a solution of acrylic resin in organic solvent includes mixing titanium dioxide nanoparticles with a solution of acrylic resin in organic solvent, so as to obtain the colloid solution. The colloid solution is subjected to a stabilization treatment suitable for preventing or reducing nanoparticle aggregation, the treatment includes irradiating the colloid solution with pulsed coherent light having a wavelength substantially comprised in the ultraviolet absorption band of the titanium dioxide nanoparticles.

Optical logic gate

Verfahren und mikrovorrichtung zur identifizierung und/oder quantifizierung eines analyten in einer biologischen probe

Oligotiofeni modificati con alta efficienza quantica di luminescenza per leds organici.

Sistema per micro-caratterizzazione di dispositivi elettronici ed optoelettronici.

Albumin nanoparticles encapsulating gadolinium and method of synthesis thereof

The invention relates to cross-linked albumin nanoparticles loaded with gadolinium, for example with GdCl3 or Gd-DTPA, characterized in that they have a controlled size comprised between 50 nm and 80 nm, and that the gadolinium molecules are encapsulated by albumin, without the presence of covalent or electrostatic bonds. The gadolinium thus encapsulated has a relaxivity value greater than the reference molecules currently used for MRI diagnostics. The method of synthesis of the nanoparticles of the invention is also described.

Reusable sorbent sponges, their method of production and their use for the in-situ remediation of oil spills

The present invention refers to a reusable sorbent sponge comprising a support structure made of an open pore flexible polyurethane foam and at least one oily substance, said reusable sorbent sponge being advantageously and preferably employed for the in-situ remediation of oil spills. The present invention also refers to a method for producing said reusable sorbent sponge.

Transistore biomolecolare ad effetto di campo comprendente di un film di polipeptidi, e procedimento per la sua realizzazione

Method for the gram-scale preparation of cubic ferrite nanocrystals for biomedical applications

The present invention relates to a method for producing ferrite nanocrystals, comprising the following steps: i) providing a solution comprising a fatty acid, an aliphatic amine and an alcoholic solvent; ii) adding at least one organometallic precursor compound comprising a metal selected from Fe, Mn, Co and Zn and an aromatic organic molecule to the solution in point i) thereby obtaining a reaction mixture; iii) transferring the reaction mixture obtained in step ii) to a sealed reactor, thereby obtaining a filling percentage thereof of between 20 and 70 vol.%; and iv) heating said sealed reactor to a temperature of between 160°C and 240°C for at least 3 hours.

Method for the gram-scale preparation of cubic ferrite nanocrystals for biomedical applications

Method for the gram-scale preparation of cubic ferrite nanocrystals for biomedical applications

The present invention relates to a method for producing ferrite nanocrystals, comprising the following steps: i) providing a solution comprising a fatty acid, an aliphatic amine and an alcoholic solvent; ii) adding at least one organometallic precursor compound comprising a metal selected from Fe, Mn, Co and Zn and an aromatic organic molecule to the solution in point i) thereby obtaining a reaction mixture; iii) transferring the reaction mixture obtained in step ii) to a sealed reactor, thereby obtaining a filling percentage thereof of between 20 and 70 vol.%; and iv) heating said sealed reactor to a temperature of between 160°C and 240°C for at least 3 hours.

Continuous-wave pumped colloidal nanocrystal laser

Laser device characterized in that it comprises, as gain medium, a film of colloidal nanocrystals of semiconductor material, wherein said nanocrystals are two-dimensional nanocrystals suitable for forming quantum wells for confinement of the charge carriers in the nanocrystals and having a biexciton gain mechanism.

Process for the preparation of titanium dioxide with nanometric dimensions and controlled shape

The present invention relates to an industrial applicable process for the preparation of materials with nanometric dimensions and controlled shape, based on titanium dioxide. The invention also relates to a process for the preparation of titanium dioxide nanorods with anatase phase composition, which are highly suitable for applications involving photovoltaic cells, particularly Dye Sensitized Solar Cells (DSSC), photoelectrolysis cells and tandem cells for the conversion of solar energy and the production of hydrogen.

Optical Logic Gate

Optical logic gate having a second-harmonic generator element that receives a first and a second optical input signal respectively having a first and a second angular frequency and respectively having a first and a second polarization, and which provides a second-harmonic optical signal having a third angular frequency and a third polarization. The third angular frequency is equal to the sum of the first and the second angular frequency. The third polarization is a function of the first and the second polarization. The second-harmonic generator element includes a second-harmonic generator layer in a material having a non-null second-order optical tensor.

Optical logic gate

Optical logic gate (1) having a second -harmonic generator element (15) that receives a first (s ii ) and a second optical input signal (s i2 ) respectively having a first (ω 1 ) and a second angular frequency (ω 2 ) and respectively having a first (P; S) and a second (P; S) polarization, and which provides a second-harmonic optical signal (s u3 ) having a third angular frequency (2ω i , ω 1 +ω 2 ) and a third (P; S) polarization. The third angular frequency (2ω i , ω 1 +ω 2 ) is equal to the sum of the first (ω 1 ) and the second angular frequency (ω 2 ). The third (P; S) polarization is a function of the first (P; S) and the second (P; S) polarization. The second-harmonic generator element (15) includes a second-harmonic generator layer (22) in a material having a non-null second-order optical tensor.

Optical logic gate

Optical logic gate (1) having a second -harmonic generator element (15) that receives a first (s ii ) and a second optical input signal (s i2 ) respectively having a first (ω 1 ) and a second angular frequency (ω 2 ) and respectively having a first (P; S) and a second (P; S) polarization, and which provides a second-harmonic optical signal (s u3 ) having a third angular frequency (2ω i , ω 1 +ω 2 ) and a third (P; S) polarization. The third angular frequency (2ω i , ω 1 +ω 2 ) is equal to the sum of the first (ω 1 ) and the second angular frequency (ω 2 ). The third (P; S) polarization is a function of the first (P; S) and the second (P; S) polarization. The second-harmonic generator element (15) includes a second-harmonic generator layer (22) in a material having a non-null second-order optical tensor.

Optical logic gate

Optical logic gate (1) having a second -harmonic generator element (15) that receives a first (s ii ) and a second optical input signal (s i2 ) respectively having a first (ω 1 ) and a second angular frequency (ω 2 ) and respectively having a first (P; S) and a second (P; S) polarization, and which provides a second-harmonic optical signal (s u3 ) having a third angular frequency (2ω i , ω 1 +ω 2 ) and a third (P; S) polarization. The third angular frequency (2ω i , ω 1 +ω 2 ) is equal to the sum of the first (ω 1 ) and the second angular frequency (ω 2 ). The third (P; S) polarization is a function of the first (P; S) and the second (P; S) polarization. The second-harmonic generator element (15) includes a second-harmonic generator layer (22) in a material having a non-null second-order optical tensor.

Optical logic gate

Optical logic gate (1) having a second -harmonic generator element (15) that receives a first (s ii ) and a second optical input signal (s i2 ) respectively having a first (ω 1 ) and a second angular frequency (ω 2 ) and respectively having a first (P; S) and a second (P; S) polarization, and which provides a second-harmonic optical signal (s u3 ) having a third angular frequency (2ω i , ω 1 +ω 2 ) and a third (P; S) polarization. The third angular frequency (2ω i , ω 1 +ω 2 ) is equal to the sum of the first (ω 1 ) and the second angular frequency (ω 2 ). The third (P; S) polarization is a function of the first (P; S) and the second (P; S) polarization. The second-harmonic generator element (15) includes a second-harmonic generator layer (22) in a material having a non-null second-order optical tensor.

A magnetic actuator having a nanocomposite membrane

A magnetic actuator (1) comprising a substrate (3), a membrane layer (5) directly or indirectly applied on a surface (3 a) of the substrate (5), in which the membrane layer consists of a matrix of elastic polymer material, in which nanoparticles of magnetic material, capable of undergoing a dynamic effect under the action of a magnetic field, are dispersed, and at least one magnetic field generator (11) suitable to generate a magnetic field acting on the membrane layer (5), in which the magnetic field generator (11) is directly or indirectly arranged on the surface of the substrate, or within the substrate.

A magnetic actuator having a nanocomposite membrane

Process for encapsulating a liquid

Globular microstructures comprising a liquid core and a solid shell that envelops the core comprising polymeric micro- or nanofibres, preferably obtained by electrospinning, comprising a hydrophobic polymer or a mixture of hydrophobic polymer with polymers derived from cellulose or with polyacrylates; the microstructures may have a further coating of nanoparticles or polymeric coating. The microstructures have applications similar to those of "liquid marbles" with improved mechanical properties.

Process for the production of biodegradable plastics material from cellulose plant wastes

Process for the production of a biodegradable plastics material obtained from plant waste materials, characterised in that it comprises the operations of: a) dissolving the said plant waste material in an anhydrous solvent comprising anhydrous trifluoroacetic acid; in order to dissolve a cellulose fraction of the said material, the said waste material being at least partly dehydrated in such a way that its water content is not likely to cause hydrolysis of the said cellulose fraction, and b) removing solvent from the solution containing the said non-hydrolysed cellulose fraction.

Luminescent organic material for light-emitting devices

A luminescent organic material for light-emitting devices, in particular, for organic LEDs, having at least one thienyl-S,S-dioxide unit obtained by functionalizing the sulfur of a thiophene ring. Inserting a thiophene ring functionalized with oxygen atoms in oligothiophenes of appropriate length and symmetry provided for maintaining or increasing intrinsic quantum efficiency and for modulating the wavelength of the emitted light.

Methods for the production of biodegradable plastics material from cellulose plant wastes

Methods for the production of a biodegradable plastics material obtained from plant waste materials are provided which include the steps of dissolving plant waste material in an anhydrous solvent which includes anhydrous trifluoroacetic acid in order to dissolve a cellulose fraction of the material, the waste material being at least partly dehydrated in such a way that its water content is not likely to cause hydrolysis of the cellulose fraction, and removing the solvent from the solution containing the non-hydrolyzed cellulose fraction.

New quantum dot laser structure

The present invention uses a p-type Gallium Arsenide substrate or an underlying p-type grown layer with the consequent inversion of the doping sequence in order to realise a n-i-p structure. This results in the heterostructure built-in electric field being opposite to the QD internal dipole electric field. As a consequence the separation of the ground state electron and hole wavefunctions is strongly reduced, resulting in a high efficiency ground state optical emission in the region of 1.4 microns.

Sistema per micro-caratterizzazione di dispositivi elettronici ed opto elettronici.

Optical system for detecting the concentration of combustion products

Optical system for detecting the concentration of combustion products operating in situ and at high temperature based on measurement of the optical absorption of a gaseous mixture of combustion products through a photodetecting sensor based on gallium nitride (GaN), aluminium nitride (AlN), indium nitride (InN) and corresponding alloys. The operating temperature of the sensor preferably lies between 500° C. and 700° C., but the resistance of the active material permits use at even higher temperatures. This system can be used to measure the concentration of chemical species present in combustion products directly at their outlet, where the high operating temperature makes it possible to avoid fouling of the sensor caused by carbonaceous and non-carbonaceous deposits. The rate of response of the system is less than or equal to 1 millisecond and makes it possible to adjust the parameters of an associated combustion process control system in real time.

A biomolecular field-effect transistor comprising a polypeptide film and a method for the manufacture thereof

An organic field-effect transistor (T) is described, which comprises: a pair of source and drain electrode (S, D) which are formed on an electrically insulating layer (INS) and which are adapted to operate as the source and the collector of a flow of electric charge-carriers in which the majority carriers are free holes, and a layer of organic conductive material (F) which is disposed between the electrodes (S, D) for the formation of a conduction region through which the flow of charge carriers passes and the resistance of which is modulated by the application of a control voltage to a gate electrode (G) insulated from the conduction region, characterized in that the layer of organic conductive material (F) is a layer of biomolecular conductive material including a film of polypeptides or oligopeptides (P). The method for the manufacture of a transistor of this type comprises the formation of a film (F) of polypeptides or oligopeptides (P) on the electrically insulating layer (INS) in contact with the source and drain- electrodes (S, D) by immobilization of the polypeptides/oligopeptides (P) on the layer (INS) by deposition of a buffer solution of polypeptides/oligopeptides (P), subsequent incubation for a predetermined period of time and at a predetermined temperature, removal of the buffer solution, and drying by exposure to a stream of gas.

A biomolecular field-effect transistor comprising a polypeptide film and a method for the manufacture thereof

An organic field-effect transistor (T) is described, which comprises: a pair of source and drain electrode (S, D) which are formed on an electrically insulating layer (INS) and which are adapted to operate as the source and the collector of a flow of electric charge-carriers in which the majority carriers are free holes, and a layer of organic conductive material (F) which is disposed between the electrodes (S, D) for the formation of a conduction region through which the flow of charge carriers passes and the resistance of which is modulated by the application of a control voltage to a gate electrode (G) insulated from the conduction region, characterized in that the layer of organic conductive material (F) is a layer of biomolecular conductive material including a film of polypeptides or oligopeptides (P). The method for the manufacture of a transistor of this type comprises the formation of a film (F) of polypeptides or oligopeptides (P) on the electrically insulating layer (INS) in contact with the source and drain- electrodes (S, D) by immobilization of the polypeptides/oligopeptides (P) on the layer (INS) by deposition of a buffer solution of polypeptides/oligopeptides (P), subsequent incubation for a predetermined period of time and at a predetermined temperature, removal of the buffer solution, and drying by exposure to a stream of gas.

A biomolecular field-effect transistor comprising a polypeptide film and a method for the manufacture thereof

An organic field-effect transistor (T) is described, which comprises: a pair of source and drain electrode (S, D) which are formed on an electrically insulating layer (INS) and which are adapted to operate as the source and the collector of a flow of electric charge-carriers in which the majority carriers are free holes, and a layer of organic conductive material (F) which is disposed between the electrodes (S, D) for the formation of a conduction region through which the flow of charge carriers passes and the resistance of which is modulated by the application of a control voltage to a gate electrode (G) insulated from the conduction region, characterized in that the layer of organic conductive material (F) is a layer of biomolecular conductive material including a film of polypeptides or oligopeptides (P). The method for the manufacture of a transistor of this type comprises the formation of a film (F) of polypeptides or oligopeptides (P) on the electrically insulating layer (INS) in contact with the source and drain- electrodes (S, D) by immobilization of the polypeptides/oligopeptides (P) on the layer (INS) by deposition of a buffer solution of polypeptides/oligopeptides (P), subsequent incubation for a predetermined period of time and at a predetermined temperature, removal of the buffer solution, and drying by exposure to a stream of gas.

A biomolecular field effect transistor comprising a polypeptide film, and a method for its manufacturing

An organic field-effect transistor (T) is described, which comprises: a pair of source and drain electrode (S, D) which are formed on an electrically insulating layer (INS) and which are adapted to operate as the source and the collector of a flow of electric charge-carriers in which the majority carriers are free holes, and a layer of organic conductive material (F) which is disposed between the electrodes (S, D) for the formation of a conduction region through which the flow of charge carriers passes and the resistance of which is modulated by the application of a control voltage to a gate electrode (G) insulated from the conduction region, characterized in that the layer of organic conductive material (F) is a layer of biomolecular conductive material including a film of polypeptides or oligopeptides (P). The method for the manufacture of a transistor of this type comprises the formation of a film (F) of polypeptides or oligopeptides (P) on the electrically insulating layer (INS) in contact with the source and drain- electrodes (S, D) by immobilization of the polypeptides/oligopeptides (P) on the layer (INS) by deposition of a buffer solution of polypeptides/oligopeptides (P), subsequent incubation for a predetermined period of time and at a predetermined temperature, removal of the buffer solution, and drying by exposure to a stream of gas.

Process for the production of biodegradable plastics material from cellulose plant wastes

Process for the production of a biodegradable plastics material obtained from plant waste materials, characterised in that it comprises the operations of: a) dissolving the said plant waste material in an anhydrous solvent comprising anhydrous trifluoroacetic acid; in order to dissolve a cellulose fraction of the said material, the said waste material being at least partly dehydrated in such a way that its water content is not likely to cause hydrolysis of the said cellulose fraction, and b) removing solvent from the solution containing the said non-hydrolysed cellulose fraction.

Optical and atomic force microscopy integrated system for multi-probe spectroscopy measurements applied in a wide spatial region with an extended range of force sensitivity.

An optical and atomic force microscopy measurement integrated system, comprising an atomic force microscope having a first probe apt to interact with a sample to be analysed, an optical tweezer, a second probe apt to be held in the focus of the optical tweezer, movement means for moving the two probes, measurement means for measuring the variations of position of the two probes and processing means apt to receive in input the measurement signals of the two probes to generate an output signal representative of the sample.

Microdispositivo integrato per reazioni di amplificazione di acidi nucleici

Process for the production of poly(cyanoacrylate) fibres

Process for the production of poly(cyanoacrylate) micro- or nanofibres, comprising the operations of: - mixing the cyanoacrylate monomer with a dipolar aprotic solvent to form a poly(cyanoacrylate) gel; - dissolving the gel in a solvent for acrylates, able to form a solution suitable for electro spinning; and - submitting the solution obtained to electro spinning to form said micro- or nanofibres; the micro- or nanofibres thus obtained can be used for forming coatings that adhere to a substrate as a result of thermal treatment with fusion.

Processo de produção de material plásticos biodegradáveis a partir de resíduos de plantas celulósicas

processo de produção de material plásticos biodegradáveis a partir de resíduos de plantas celulósicas é descrito um processo para a produção de um material plástico biodegradável obtido a partir de materiais de resíduos de plantas, compreendendo as operações de: a) dissolver o referido material de resíduos de plantas em um solvente anidro compreendendo ácido trifluoroacético anidro, para dissolver uma fração de celulose do dito material, com o referido material de resíduos sendo pelo menos parcialmente desidratado, de modo a que seu teor de água não seja adequado para provocar a hidrólise da citada fração de celulose; e b) remoção do solvente a partir da solução contendo a fração de celulose não hidrolizada.

An optical system for detecting the concentration of combustion products

Optical system for detecting the concentration of combustion products operating in situ and at high temperature based on measurement of the optical absorption of a gaseous mixture of combustion products through a photodetecting sensor based on gallium nitride (GaN), aluminium nitride (AlN), indium nitride (InN) and corresponding alloys. The operating temperature of the sensor preferably lies between 500 °C and 700 °C, but the resistance of the active material permits use at even higher temperatures. This system can be used to measure the concentration of chemical species present in combustion products directly at their outlet, where the high operating temperature makes it possible to avoid fouling of the sensor caused by carbonaceous and non-carbonaceous deposits. The rate of response of the system is less than or equal to 1 millisecond and makes it possible to adjust the parameters of an associated combustion process control system in real time.

An optical system for detecting the concentration of combustion products

Optical system for detecting the concentration of combustion products operating in situ and at high temperature based on measurement of the optical absorption of a gaseous mixture of combustion products through a photodetecting sensor based on gallium nitride (GaN), aluminium nitride (AlN), indium nitride (InN) and corresponding alloys. The operating temperature of the sensor preferably lies between 500° C. and 700° C., but the resistance of the active material permits use at even higher temperatures. This system can be used to measure the concentration of chemical species present in combustion products directly at their outlet, where the high operating temperature makes it possible to avoid fouling of the sensor caused by carbonaceous and non-carbonaceous deposits. The rate of response of the system is less than or equal to 1 millisecond and makes it possible to adjust the parameters of an associated combustion process control system in real time.

Optisches System zur Regelung des Verbrennungsverfahrens in einem Verbrennungsmotor

Optisches system zur regelung des verbrennungsverfahrens in einem verbrennungsmotor

Methods for the colloidal synthesis of lithium iron phosphate

Methods for producing lithium iron phosphate or lithium manganese phosphate or lithium iron manganese phosphate, by colloidal synthesis are provided. Such methods include the operation of reacting a lithium salt, an iron(II) halide (and/or a manganese(II) halide) and a phosphorus compound, which, under the reaction conditions, is capable of releasing the phosphate ion, in the presence of an organic surfactant or a mixture of organic surfactants including an alkylamine or alkenylamine, in which the surfactant or mixture of surfactants is capable of dissolving the lithium salt and the iron halide (and/or the manganese halide), where used, in an organic solvent, which is liquid at room temperature, in which the surfactant or mixture of surfactants is soluble, the reaction being performed at a temperature not lower than 250° C.

Functionalized thiophene oligomers and their use as fluorescent markers

Thiophene oligomers which are excitable in the visible and ultraviolet region and each having at least one functional group able to form a covalent bond with organic and/or biological molecules, so as not to alter either the fluorescence properties of the oligomers or the biological activity of the bound molecules, and their use as fluorescent markers in analysis techniques.

Functionalized thiophene oligomers and their use as fluorescent markers

Thiophene oligomers which are excitable in the visible and ultraviolet region and each having at least one functional group able to form a covalent bond with organic and/or biological molecules, so as not to alter either the fluorescence properties of the oligomers or the biological activity of the bound molecules, and their use as fluorescent markers in analysis techniques. <IMAGE>

Functionalized thiophene oligomers and their use as fluorescent markers

Thiophene oligomers which are excitable in the visible and ultraviolet region and each having at least one functional group able to form a covalent bond with organic and/or biological molecules, so as not to alter either the fluorescence properties of the oligomers or the biological activity of the bound molecules, and their use as fluorescent markers in analysis techniques. <IMAGE>

A method of synthesizing branched gold nanoparticles having controlled size and branching

A method of synthesizing branched gold nanoparticles is described, starting from an aqueous solution of gold nanoparticle spherical seeds, which is subjected to a growth treatment with an aqueous solution comprising hydroxylamine or a salt thereof as a reducing agent and 4-(2-hydroxyethyl)-l-piperazineethanesulfonic acid (HEPES) as an agent that directs the shape of the nanostructure, and by subsequent addition of an aqueous solution of chloroauric acid (HAuCl4). The structural features and the properties of the branched gold nanoparticles obtained by the method of the invention are also described.

A method of synthesizing branched gold nanoparticles having controlled size and branching

A method of synthesizing branched gold nanoparticles is described, starting from an aqueous solution of gold nanoparticle spherical seeds, which is subjected to a growth treatment with an aqueous solution comprising hydroxylamine or a salt thereof as a reducing agent and 4-(2-hydroxyethyl)-l-piperazineethanesulfonic acid (HEPES) as an agent that directs the shape of the nanostructure, and by subsequent addition of an aqueous solution of chloroauric acid (HAuCl4). The structural features and the properties of the branched gold nanoparticles obtained by the method of the invention are also described.

A method of synthesizing branched gold nanoparticles having controlled size and branching

A method of synthesizing branched gold nanoparticles is described, starting from an aqueous solution of gold nanoparticle spherical seeds, which is subjected to a growth treatment with an aqueous solution comprising hydroxylamine or a salt thereof as a reducing agent and 4-(2-hydroxyethyl)-l-piperazineethanesulfonic acid (HEPES) as an agent that directs the shape of the nanostructure, and by subsequent addition of an aqueous solution of chloroauric acid (HAuCl4). The structural features and the properties of the branched gold nanoparticles obtained by the method of the invention are also described.

Procedimento di sintesi di nanoparticelle d'oro stellate aventi dimensioni e ramificazioni controllate e nanoparticelle d'oro stellate così ottenute

Sorgente di luce bianca non incandescente

Processo de produção de material plásticos biodegradáveis a partir de resíduos de plantas celulósicas

Process for the colloidal synthesis of lithium iron phosphate

The process for producing lithium iron phosphate or lithium manganese phosphate or lithium iron manganese phosphate, via colloidal synthesis, comprises the operation of reacting a lithium salt, an iron(II) halide (and/or a manganese(II) halide) and a phosphorus compound, which, under the reaction conditions, is capable of releasing the phosphate ion, in the presence of an organic surfactant or a mixture of organic surfactants comprising an alkylamine or alkenylamine, in which the said surfactant or mixture of surfactants is capable of dissolving the lithium salt and the iron halide (and/or the manganese halide), where used, in an organic solvent, which is liquid at room temperature, in which the said surfactant or mixture of surfactants is soluble, the reaction being performed at a temperature not lower than 250°C.