Ternary and quaternary nanocrystals, processes for their production and uses thereof

TERNARY AND QUATERNARY NANOCRYSTALS, PROCESSES FOR THEIR PRODUCTION AND USES THEREOF

Active powder concrete taking river sand or tail sand as aggregate and preparation method thereof

The invention relates to an active powder concrete taking river sand or tail sand as aggregate and a preparation method thereof. The active powder concrete is prepared from a gelled material, an aggregate, water, a water reducing agent and steel fibers according to the mass ratio of 1: 0.8-1.3: 0.1-0.25:0.005-0.07:0.01-0.25, wherein the aggregate is one or a mixture of river sand and tail sand. The preparation method comprises the following steps of: pouring weighed gelled material, aggregate and steel fibers in a mixer, uniformly mixing, adding water in which the water reducing agent is dissolved, uniformly mixing, forming in a vibration or compression way, and curing the formed test specimen by autoclaving or steam to obtain active powder concrete. In the invention, traditional quartz sand used for making active powder concrete is replaced by river sand and tail sand. The prepared active powder concrete not only has the advantages of high concrete strength and good durability, but also ...

Detection system and method for accurately measuring ion beam spot width

The invention discloses a device and a method for accurately measuring the width of beam spots of ion beams, which relates to ion implanters and belongs to the field of manufacturing semiconductor integrated circuit devices. The device comprises a moving Faraday cup, a dose sampling Faraday cup, a dose detector, a numerical-control scanning generator, a motor motion controller and a control computer. The computer coordinates and controls the actions of every part. The measurement method comprises the following steps: the moving Faraday cup passes through a target chamber in the horizontal direction; an ion beam current is sampled at every position point where the moving Faraday cup pauses; sampling signals are amplified and subjected to analog-digital conversion via the dose detector and then sent to the control computer so as to be stored; the control computer simultaneously records corresponding position codes of the moving Faraday cup; after the moving Faraday cup horizontally passes ...

Wafer implanting transition clamp for implanter

The invention relates to a wafer clamp for an ion implanter which belongs to the field of semiconductor equipment manufacture. A full set of specific target chamber wafer transfer device and wafer clamping device for injection is designed in specific dimensions by an implanter so as to achieve the goal that beam width sufficiently satisfies the dimensional requirements of an implanting wafer on the same machine. When an implantation process of a small-dimension wafer is adopted, a wafer transfer mechanical arm, a direction finding station and a target disk wafer clamping mechanism at least need to be change often, and if the full set of device is changed, a designer for a target chamber implanting flow system has big work load, an equipment maintenance engineer has complex work when in replacement and disassembly and assembly of each time, and the positioning repeatability and reliability of a mechanical structure are greatly reduced. In order to avoid the complex design of the target chamber ...

Low-shrink anchorage sealing material for CRTS I type ballastless track slabs of high speed railway

The invention relates to a low-shrink anchorage sealing material for CRTS I type ballastless track slabs of a high speed railway, which is characterized by comprising the following components in proportion: 1 cement, 0.05-0.15 swelling agent, 0.1-0.3 limestone powder, 0.05-0.3 metakaolin, 0.1-0.3 coal ash, 0.01-0.05 water reducer, 0.02-0.05 emulsoid powder, 0.1-0.25 siliceous micropowder, 0.01-0.04 enhanced compacting agent, 1.0-2.0 sand, and 0.1-0.2 water. The material of the invention has the characteristics of low shrinkage rate, high compressive strength and cohesive strength, high osmosis resistance and low chloride ion content, and can be used for anchorage sealing of prestress tension holes of the CRTS I type ballastless track slabs of the high speed railway.

Emulsified bitumen for vertical connected plate type unballasted track cement emulsified bitumen mortar

The invention relates to emulsified asphalt for longitudinal connecting plate type ballastless track cement emulsified asphalt mortar. The emulsified asphalt comprises the following components in percentage by weight: 60 to 65 percent of asphalt, 0.2 to 5 percent of anionic emulsifier, 0.02 to 3 percent of stabilizing agent, 0 to 4 percent of assistant, and the balance being water; and the wax content of the asphalt is less than or equal to 2.2 percent. The emulsified asphalt for the longitudinal connecting plate type ballastless track cement emulsified asphalt mortar has good emulsifying effect, is not only suitable for storage and usage under normal temperature environment, but also suitable for storage and usage under the environment of lower temperature or higher temperature, and has the advantages of good storage stability, strong temperature adaptability and the like; and the cement emulsified asphalt mortar prepared by the emulsified asphalt has the advantages of long working time ...

Method for detecting HBV DNA and single base mutation by resonance energy transfer based on quantum dots

The invention relates to a method for detecting HBV DNA and single base mutation by resonance energy transfer based on quantum dots, which comprises the following steps: preparing CdSe/Zns core/shell structured quantum dots coated with mercaptopropionic acid MPA; designing and synthesizing an HBV DNA detection probe; preparing a QDs-DNA probe cross-linked matter; preparing an HBV DNA clinical sample; and using a microplate reader to carry out high-throughput detection on complementary and single base mutation HBV target DNA. The method is simple for operation and does not need to carry out separation and purification on the DNA which is not linked in a hybrid system; as Cy5 can not directly produce a fluorescence signal under the selected exciting light (485nm), the background interference is small and the signal is strong; and the method further has the characteristics of being specific and rapid and having high resolution, high sensitivity and high throughput, and can be used for HBV ...

Locating support table of wafer box for rapid thermal treatment furnace

The invention discloses a locating support table of a wafer box, relating to a rapid thermal treatment furnace and belonging to the field of semiconductor manufacture. The locating support table comprises a wafer box frame, a rotating hooked connecting bar, a fixed trestle table and a miniature travel switch, wherein the rotating hooked connecting bar is controlled by a tension spring; and the miniature travel switch is linked with a pressure spring and a compression bar; the wafer box frame is used for supporting the wafer box and connected with the fixed trestle table by bolts; the rotating hooked connecting bar assisted by the tension spring is used for hooking and fixing the wafer box; and the fixed trestle table is used for fixing the whole wafer box frame and fixing the whole wafer box frame table in a wafer transmission system. The wafer is fetched to an accurate position in the wafer box by a manipulator; when the wafer box is on the locating support table, the spring compression ...

Novel rapid wafer annealing device

The invention relates to a novel rapid wafer annealing device. An upper row and a lower row of orthogonal heating lighting tubes are applied to rapidly heat a wafer arranged in a quartz cavity, the lighting tubes are suitably arranged and partitioned to adjust the distribution of heat fields, a special coating coated on the inner wall of a metal cavity is heated to enhance the reflection of infrared rays, and the roughening treatment of the coating aims to randomize a light path so as to uniformly distribute radiation on the whole wafer. The invention is particularly suitable for heat treatment devices, such as a rapid annealing furnace and belongs to the field of semiconductor manufacture.

Method and device for accurately detecting and correcting parallelism of ion beam

The invention discloses a method and a device for accurately detecting and correcting parallelism of an ion beam, relates to an ion implantation machine, and belongs to the field of semiconductor integrated circuit device manufacturing. The device for detecting and correcting the parallelism comprises a parallelism correcting magnet, a correcting magnet power supply, a moving Faraday cup, a sampling Faraday cup, a dosage detector, a digital scanning generator, a motor motion controller, and a control computer. The parallelism correcting magnet is arranged at a proper position behind an electrostatic scanning plate, and a magnet exciting coil of the parallelism correcting magnet is connected with the correcting magnet power supply. The output of the sampling Faraday cup is connected with the dosage detector; the output of the digital scanning generator is connected with a scanning amplifier and the scanning amplifier is connected with the electrostatic scanning plate. The output of the motor ...

SG3525 application in ion implanter switch power supply

The invention relates to a switching power supply controller used for a novel ion implanter. Most ion implanters adopt a switching power supply and the stability of the switching power supply in an old-model ion implanter is poor while the novel switching power supply requires high frequency and fast response speed. The invention adopts the second-generation pulse width modulator SG3525 of GE to drive various high-frequency power amplifier tubes of the switching power supply arranged on the novel ion implanter.

Rapid heat-treatment temperature measuring and controlling system and measuring and controlling method

The invention discloses a rapid heat-treatment temperature measuring and controlling system and a measuring and controlling method. The system comprises an infrared pyrometer, a standard K-shaped thermoelectric couple silicon wafer, a temperature signal processor, a thermoelectric couple thermodetector, a heating power regulator, an alternating current zero crossing detector, a timing counter, a controllable silicon control signal isolation amplifier, a controllable silicon heating source, a heating light set and a control computer. The connection relationships of the assemblies are shown as an attached drawing 1 and the whole system is uniformly coordinated by the control computer for controlling, wherein the heating power regulator is internally set in the program of the computer. The temperature measuring and controlling method comprises the steps of measuring and calibrating the temperature by using the standard thermoelectric couple, measuring the temperature by using the infrared ...

Dry material for vertical connected plate type unballasted track cement emulsified bitumen mortar

The invention relates to a dry material used for a cement emulsified bitumen mortar of vertical connecting plate type ballastless rails, which comprises the following components in portion by weight: 100 portions of gelled material, 138 to 195 portions of sand, 0.05 to 0.5 portion of fiber, 0.003 to 0.01 portion of aluminum powder, 0 to 0.1 portion of polymer, and 0 to 10 portions of stone dust. By adding fiber, particularly hydrophilic fiber to dry materials, the toughness, the shock resistance and the fatigue resistance of the mortar prepared from the dry materials can be improved, the bleeding phenomenon of the mortar can be avoided and the lasting quality of the mortar can be improved; simultaneously, by selecting different gelled materials, particularly the combinations of between the different gelled materials, the problem that the prior dry material and the mortar prepared from the dry materials are difficult to satisfy the requirements on various construction environments and use ...

Method for detecting HBV DNA and single base mutation based on quantum dot resonance energy transfer

The invention relates to a method for detecting HBV DNA and single base mutation based on quantum dot resonance energy transfer, which comprises the following steps: preparing an MPA-coated CdSe/ZnS nucleus/shell structural quantum dot; designing and synthesizing a HBV DNA detection probe; preparing a QDs-DNA probe cross-linking agent; and detecting high flux of complementary target HBV DNA and single base mutation. Since Cy5 can not directly generate fluorescence signals under 485nm lighter excitation, the method has simple operation, can be compatible with various instruments without separating unlinked DNA in a hybridization system, has little background interference and strong signal; and the invention, also has the characteristics of specificity, speediness, high resolution, high sensitivity and high flux, and can be applied to detection of the target HBV DNA and single base mutation in clinical medicine.

Rapid heat-treatment temperature measuring and controlling system and measuring and controlling method

The invention discloses a rapid heat-treatment temperature measuring and controlling system and a measuring and controlling method. The system comprises an infrared pyrometer, a standard K-shaped thermoelectric couple silicon wafer, a temperature signal processor, a thermoelectric couple thermodetector, a heating power regulator, an alternating current zero crossing detector, a timing counter, a controllable silicon control signal isolation amplifier, a controllable silicon heating source, a heating light set and a control computer. The connection relationships of the assemblies are shown as an attached drawing 1 and the whole system is uniformly coordinated by the control computer for controlling, wherein the heating power regulator is internally set in the program of the computer. The temperature measuring and controlling method comprises the steps of measuring and calibrating the temperature by using the standard thermoelectric couple, measuring the temperature by using the infrared ...

Movable type falling protection device for cement pole operation

The invention discloses a movable type falling protection device for cement pole operation, comprising a telescopic insulating rod, a rope type falling protector and an opening adjustable type hook. The movable type falling protection device is characterized in that the opening adjustable type hook comprises a hook body, a clamping type connecting rod, an opening pull rope, a safety catch, a hanging ring and a belaying cable, wherein the safety catch is axially connected with the hook body; one end of the opening pull rope is connected with the safety catch, and the other end of the same extends to the bottom end of the telescopic insulating rod; one end of the belaying cable is connected with the hanging ring through the safety catch, and the other end of the same hangs a weight so that the belaying cable keeps in a vertical state; one end of the clamping type connecting rod is fixed with the hook body, and the other end of the same is provided with a clamping type connecting head; the ...

Low-carbon steel cold rolled sheet continuous annealing process

The invention relates to a low-carbon steel continuous annealing process, whose the character includes the following steps: a) entering the heating stove with the temperature of 750 Celsius system to 800 Celsius system for rapid heating for 206 to 410 seconds, b) entering the heating stove with the temperature of 850 Celsius system to 900 Celsius system for further heating for 56 to 110 seconds, c) enter the non-oxidability ambience constituted by H2N2 for cooling down 55-130 seconds to 100 Celsius system, d) entering the water cooling section with the water as heat-eliminating medium for cooling down 5-20 seconds to room temperature. The invention provides a low-carbon steel cold rolled sheet continuous annealing process, which improves the property of low-carbon steel after anneal, and the process has the advantage of simple process and low construction cost of process equipment.

High-performance cement-based shrink-free corrosion-proof grouting agent

Vertical connected plate type unballasted track cement emulsified bitumen mortar

The invention relates to a cement emulsified bitumen mortar for vertical connecting plate type ballastless rails, which comprises the following components in portion by weight: 1,370 to 1,516 portions of dry material, 230 to 270 portions of emulsified bitumen, 0 to 68 portions of polymer emulsion, 162 to 210 portions of water, 0.5 to 5 portions of water reducing agent, and 0 to 4 portions of antifoaming agent. The cement emulsified bitumen mortar has the advantages of good environment adaptability and working performance, agreeable mechanical property, small shrinkage, good crack resistance and superior lasting quality, is the cement emulsified bitumen mortar with high elasticity modulus, and can satisfy the requirements on different construction and use environmental conditions of the vertical connecting plate type ballastless rails for high speed railways and passenger dedicated lines in China.

One-dimensional mechanical scaning device of ion implantation apparatus

High-performance cement-based shrink-free corrosion-proof grouting agent

The invention belongs to a post-tensioned prestressed concrete and girder drill-way grouting material adopting such ingredients as slushing (5-10 percent ), water retention (15-50 percent), plastic stage inflation (1-5 percent), later period microdilatancy (30-55 percent), anti-rust (0.2-0.8 percent), solidification adjustive agent (0.2-0.8 percent) and air-entraining admixture (0.5-0.1 percent). The cement-based non-contraction anti-corrosion grouting admixture preparation method is characterized in that the components get weighed according to the weight fraction and then poured into a mixer to produce the invention after even being stirred. The invention is utilized together with cement and water according to a certain proportion in engineering. The invention has the advantages that the raw material is sourced broadly, and the cost is low; bags are packed with on-spot mixture and the operation is easy with little, thereby causing little pollution; the invention has good fluidity and the ...

Method for detecting HBV DNA and single base mutation based on quantum dot resonance energy transfer

The invention relates to a method for detecting HBV DNA and single base mutation based on quantum dot resonance energy transfer, which comprises the following steps: preparing an MPA-coated CdSe/ZnS nucleus/shell structural quantum dot; designing and synthesizing a HBV DNA detection probe; preparing a QDs-DNA probe cross-linking agent; and detecting high flux of complementary target HBV DNA and single base mutation. Since Cy5 can not directly generate fluorescence signals under 485nm lighter excitation, the method has simple operation, can be compatible with various instruments without separating unlinked DNA in a hybridization system, has little background interference and strong signal; and the invention, also has the characteristics of specificity, speediness, high resolution, high sensitivity and high flux, and can be applied to detection of the target HBV DNA and single base mutation in clinical medicine.

Low-carbon steel cold rolled sheet continuous annealing process

The invention relates to a low-carbon steel continuous annealing process, whose the character includes the following steps: a) entering the heating stove with the temperature of 750 Celsius system to 800 Celsius system for rapid heating for 206 to 410 seconds, b) entering the heating stove with the temperature of 850 Celsius system to 900 Celsius system for further heating for 56 to 110 seconds, c) enter the non-oxidability ambience constituted by H2N2 for cooling down 55-130 seconds to 100 Celsius system, d) entering the water cooling section with the water as heat-eliminating medium for cooling down 5-20 seconds to room temperature. The invention provides a low-carbon steel cold rolled sheet continuous annealing process, which improves the property of low-carbon steel after anneal, and the process has the advantage of simple process and low construction cost of process equipment.

Mineral polymeric material based active powder concrete and preparation method thereof

The invention relates to a mineral polymeric material based active powder concrete and a preparation method thereof. The mineral polymeric material based active powder concrete is made of a gelled material, aggregate, an exciting agent, water, a water reducer and steel fiber in a mass ratio of 1: 0.8-1.3: 0.01-0.2: 0.1-0.3: 0.005-0.07: 0.01-0.25. The preparation method comprises the steps of: pouring the weighed gelled material, aggregate and steel fiber in an agitator and agitating evenly, adding the water in which the exciting agent and the water reducer are dissolved, mixing evenly and molding through vibration or compression, and carrying out autoclave curing or steamed curing on a molded test piece to obtain the mineral polymeric material based active powder concrete. By adopting thepreparation thought of introducing the mineral polymeric material, abundant solid wastes are mixed in the active powder concrete successfully; and the prepared active powder concrete not only has high strength ...

Concrete composite containing silicon micro powder and preparation method thereof

The invention discloses a concrete composite containing silicon micro powder and a preparation method thereof. The concrete composite is mixed and prepared from gelled material, additive, coarse aggregate, fine aggregate and water, wherein the dosage range of the gelled material in the concrete is 250 kg/m3-700 kg/m3, the gelled material contains 10 kg/m3-200 kg/m3 of silicon micro powder, and the balance is the admixture of cement and mineral. By using the concrete composite and the preparation method, concrete hydration temperature rise can be obviously reduced, the possibility of concrete cracking is reduced and the durability of concrete is effectively improved. The concrete composite and the preparation method can be prepared into concrete suitable for various purposes.

Silica micropowder-containing concrete composite admixture and preparation method thereof

The invention discloses a silica micropowder-containing concrete composite admixture and a preparation method thereof. The silica micropowder-containing concrete composite admixture consists of 10 to 95 weight percent of silica micropowder and 5 to 90 weight percent of mineral powder, wherein the silica micropowder is prepared from natural quartzite through crushing, grinding and other technology. The preparation technology comprises the following steps of: grinding the quartzite into superfine powder and uniformly mixing with other mineral powder according to a ratio. The prepared composite admixture can replace 5 to 80 percent of cement, the concrete cement consumption and water consumption can be greatly reduced when the composite admixture is prepared into high-performance concrete, and the composite admixture has the characteristics of resource and energy conservation and environment friendliness.

Dry material for vertical connected plate type unballasted track cement emulsified bitumen mortar

The invention relates to a dry material used for a cement emulsified bitumen mortar of vertical connecting plate type ballastless rails, which comprises the following components in portion by weight: 100 portions of gelled material, 138 to 195 portions of sand, 0.05 to 0.5 portion of fiber, 0.003 to 0.01 portion of aluminum powder, 0 to 0.1 portion of polymer, and 0 to 10 portions of stone dust. By adding fiber, particularly hydrophilic fiber to dry materials, the toughness, the shock resistance and the fatigue resistance of the mortar prepared from the dry materials can be improved, the bleeding phenomenon of the mortar can be avoided and the lasting quality of the mortar can be improved; simultaneously, by selecting different gelled materials, particularly the combinations of between the different gelled materials, the problem that the prior dry material and the mortar prepared from the dry materials are difficult to satisfy the requirements on various construction environments and use ...

Method for preparing yttria-stabilized zirconia powder

The invention belongs to the field of material chemistry, and in particular relates to a method for preparing yttria-stabilized zirconia powder. The method particularly adopts an ultrasonic-microwave synthesis method, carries out precursor preparation under an ultrasonic condition so as to ensure that a system can be better dispersed and doped, and adopts a microwave heating mode to dry the precursor so as to avoid agglomeration of the precursor. After the precursor is calcined at high temperature, the yttria-stabilized zirconia powder can be obtained. The powder has good dispersity, and has grain diameter reaching nanometer grade, uniform sizes and uniform distributions. The method has the advantages of simple process, low cost and the like.

Movable type falling protection device for cement pole operation

The invention discloses a movable type falling protection device for cement pole operation, comprising a telescopic insulating rod, a rope type falling protector and an opening adjustable type hook. The movable type falling protection device is characterized in that the opening adjustable type hook comprises a hook body, a clamping type connecting rod, an opening pull rope, a safety catch, a hanging ring and a belaying cable, wherein the safety catch is axially connected with the hook body; one end of the opening pull rope is connected with the safety catch, and the other end of the same extends to the bottom end of the telescopic insulating rod; one end of the belaying cable is connected with the hanging ring through the safety catch, and the other end of the same hangs a weight so that the belaying cable keeps in a vertical state; one end of the clamping type connecting rod is fixed with the hook body, and the other end of the same is provided with a clamping type connecting head; the ...

System and method for controlling ion implantation dosage

The invention discloses a system and a method for controlling an ion implantation dosage, relates to an ion implantation machine, and belongs to the field of semiconductor manufacturing. The system comprises a dosage integrator, a scanning generator, an N1 motion controller and an N1 real-time measuring and controlling device. The system and the method have the advantages of effectively increasing the ion implantation dosage value and enhancing the precision of uniformity and self-recovery function.

Method of arranging crystal wafer transfer system

The invention discloses a method of arranging a crystal wafer transfer system and provides a method which can realize fast and smooth crystal wafer transfer, aiming at the requirements of the crystal wafer transfer system of a quick annealing furnace. The crystal wafer transfer system mainly comprises a three-dimensional motion manipulator, a wafer transfer station, a wafer receiving station, a sealing ring and a cooling table, is particularly suitable for heat treatment devices, such as quick annealing furnaces and belongs to the field of semiconductor manufacture.

Method for preparing yttria-stabilized zirconia powder

The invention belongs to the field of material chemistry, and in particular relates to a method for preparing yttria-stabilized zirconia powder. The method particularly adopts an ultrasonic-microwave synthesis method, carries out precursor preparation under an ultrasonic condition so as to ensure that a system can be better dispersed and doped, and adopts a microwave heating mode to dry the precursor so as to avoid agglomeration of the precursor. After the precursor is calcined at high temperature, the yttria-stabilized zirconia powder can be obtained. The powder has good dispersity, and has grain diameter reaching nanometer grade, uniform sizes and uniform distributions. The method has the advantages of simple process, low cost and the like.

Emulsified bitumen for vertical connected plate type unballasted track cement emulsified bitumen mortar

The invention relates to emulsified asphalt for longitudinal connecting plate type ballastless track cement emulsified asphalt mortar. The emulsified asphalt comprises the following components in percentage by weight: 60 to 65 percent of asphalt, 0.2 to 5 percent of anionic emulsifier, 0.02 to 3 percent of stabilizing agent, 0 to 4 percent of assistant, and the balance being water; and the wax content of the asphalt is less than or equal to 2.2 percent. The emulsified asphalt for the longitudinal connecting plate type ballastless track cement emulsified asphalt mortar has good emulsifying effect, is not only suitable for storage and usage under normal temperature environment, but also suitable for storage and usage under the environment of lower temperature or higher temperature, and has the advantages of good storage stability, strong temperature adaptability and the like; and the cement emulsified asphalt mortar prepared by the emulsified asphalt has the advantages of long working time ...

Methods of producing cadmium selenide multi-pod nanocrystals

A detecting device for assembly position of vehicle body side walls includes a first detecting device for location surface of front position and/or a second detecting device for location surface of reverse position. The first detecting device includes two first rules (22) and a front detecting sample (21), of which the top surface (27) is flat, and the lower surface (26) is a measuring surface. The two first rules (22) are arranged at the both ends of sides of the front detecting sample (21). The first rules (22) are perpendicular to the top surface (27) of the front detecting sample (21). The second detecting device includes two second rulers (32) and a reverse detecting sample (31), of which the top surface (37) is flat, and the lower (36) surface is a measuring surface. The two second rules (32) are arranged at the both ends of sides of the reverse detecting sample (31). The detecting device can detect and adjust the transverse deflection, longitudinal linearity and tortuosity of one of the location surfaces in the assembly positions better, thus avoiding the accumulating error in detecting in the prior art. A detecting method for assembly position of vehicle body side walls is provided.

REVERSIBLY WATER-SOLUBLE NANOCRYSTALS

A general, facile, and reversible nanocrystal (NCs) phase transfer protocol via ligand exchange using nucleotides and/or nucleosides is provided to generate reversibly water-soluble nanocrystals. This phase transfer strategy can be employed on a wide variety of chemically synthesized nanostructured materials including semiconductors, metal oxides and noble metals with different sizes and shapes. The nucleotide/nucleoside-capped nanocrystals can disperse homogeneously in aqueous or alcohol media retaining, for example, high photoluminescence quantum yields. The disclosed water-soluble nanocrystals have excellent colloidal and photoluminescent stability independent on the pH and ionic strength, minimal hydrodynamic size, and are stable in cells and suitable for in vitro cell labeling, cell tracking, and other bioimaging applications. 1. A reversibly water-soluble nanocrystal comprising a core nanocrystal capped by a plurality of nucleotides , a plurality of nucleosides or a combination thereof.2. The reversibly water-soluble nanocrystal of claim 1 , wherein the core nanocrystal is a quantum dot claim 1 , a nanorod claim 1 , a metal oxide nanocube claim 1 , or a noble metal nanodot.3. The reversibly water-soluble nanocrystal of claim 1 , wherein the core nanocrystal comprises a quantum dot having a core/shell/shell structure.46.-. (canceled)7. The reversibly water-soluble nanocrystal of claim 1 , wherein the plurality of nucleotides comprises adenosine 5′-monophosphate claim 1 , guanosine 5′-monophosphate claim 1 , cytidine 5′-monophosphate claim 1 , uridine 5′-monophosphate claim 1 , thymidine 5′-monophosphate claim 1 , or combinations thereof claim 1 , and wherein the plurality of nucleosides comprises adenosine claim 1 , guanosine claim 1 , cytidine claim 1 , uridine claim 1 , thymidine claim 1 , inosine claim 1 , or combinations thereof.8. The reversibly water-soluble nanocrystal of claim 1 , wherein the plurality of nucleotides comprises adenosine 5′-diphosphate ...

ONE STEP SYNTHESIS OF CORE/SHELL NANOCRYSTAL QUANTUM DOTS

Disclosed herein are compositions and one-step synthesis of core/shell nanocrystal quantum dots. In an embodiment, a method of making a nanocrystal includes mixing at least one cationic precursor, at least one anionic precursor, and at least one solvent to form a mixture, heating the mixture, precipitating the mixture to form a nanocrystal precipitate, and isolating the nanocrystal precipitate. The formed nanocrystal comprises an outer shell encapsulating an inner core and exhibits substantial crystallinity, monodispersity, and reproducibility. 1. A method of making a nanocrystal quantum dot , the method comprising:mixing at least one cationic precursor, at least one anionic precursor, and at least one solvent to form a mixture;heating the mixture;precipitating a nanocrystal quantum dot precipitate; andisolating the nanocrystal quantum dot precipitate to obtain the nanocrystal quantum dot, wherein the nanocrystal quantum dot comprises an outer shell encapsulating an inner core and wherein the nanocrystal quantum dot exhibits substantial crystallinity, monodispersity, and reproducibility.2. The method of claim 1 , wherein the mixing comprises mixing the at least one cationic precursor selected from the group consisting of a group II metal claim 1 , a group III metal claim 1 , a group IV metal claim 1 , and a combination thereof with the at least one anionic precursor and the at least one solvent.3. The method of claim 1 , wherein the mixing comprises mixing the at least one cationic precursor claim 1 , the at least one solvent claim 1 , and the at least one anionic precursor selected from the group consisting of a group V metal claim 1 , a group VI metal claim 1 , and a combination thereof.4. The method of claim 1 , wherein the mixing comprises mixing the at least one cationic precursor claim 1 , the at least one anionic precursor claim 1 , and the at least one solvent selected from the group consisting of a coordinating solvent claim 1 , a non-coordinating solvent ...

Methods of producing cadmium selenide multi-pod nanocrystals

Methods for the non-hot-injection synthesis of semiconductor nanocrystals are described. For example, a multi-podal cadmium selenide nanocrystal may be produced by a method including heating a degassed mixture comprising cadmium oxide, selenium, trioctylphosphine, and a carboxylic acid in a non-coordinating solvent from about room temperature to about 210°C, where the multi-podal cadmium selenide nanocrystal may be a tetrapodal cadmium selenide nanocrystal.

Ternary and quaternary nanocrystals, processes for their production and uses thereof

The present invention relates to nanocrystals consisting of a homogeneous ternary or quaternary alloy having the composition M11-xM2xAyB1-y, respectively, a process for its production, as well as to uses of such nonocrystals such as short wavelength light-emitting devices, and in the detection of analytes, in particular biomolecules.

Methods of producing cadmium selenide multi-pod nanocrystals

Methods for the non-hot-injection synthesis of semiconductor nanocrystals are described. For example, a multi-podal cadmium selenide nanocrystal may be produced by a method including heating a degassed mixture comprising cadmium oxide, selenium, trioctylphosphine, and a carboxylic acid in a non-coordinating solvent from about room temperature to about 210° C., where the multi-podal cadmium selenide nanocrystal may be a tetrapodal cadmium selenide nanocrystal.