Abstract: The present disclosure relates to a method for producing metal oxide nanoparticles includes a first step of preparing a reaction solution containing a metal complex, an alcohol, and water; a second step of heating the reaction solution for phase-separation under a hermetically sealed atmosphere where the volumetric expansion ratio of the reaction solution reaches 5 to 15%; a third step of holding the reaction solution heated in the second step for 30 minutes or more for dehydrating the metal complex to precipitate the metal oxide nanoparticles; and a fourth step of collecting the metal oxide nanoparticles after the metal oxide nanoparticles are cooled.

Abstract: The present disclosure provides an ink, an ink manufacturing method, and a display device. The ink includes the first solution, the second solution, the third solution, the fourth solution, and the blank ink. The ink is mixed from the fourth solution and the blank solution. The mass percentage of the CsPbX3 in the fourth solution is 5% to 30% to the fourth solution and the blank ink.

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

Abstract: A method of generating hydrogen gas from the reaction of stabilized aluminum nanoparticles with water is provided. The stabilized aluminum nanoparticles are synthesized from decomposition of an alane precursor in the presence of a catalyst and an organic passivation agent, and exhibit stability in air and solvents but are reactive with water. The reaction of the aluminum nanoparticles with water produces a hydrogen yield of at least 85%.

Abstract: Nanoparticle paste formulations can be configured to maintain a fluid state, promote dispensation, and mitigate crack formation during nanoparticle fusion. Such nanoparticle paste formulations can contain an organic matrix and a plurality of metal nanoparticles dispersed in the organic matrix, where the plurality of metal nanoparticles constitute about 30% to about 90% of the nanoparticle paste formulation by weight. The nanoparticle paste formulations can maintain a fluid state and be dispensable through a micron-size aperture. The organic matrix can contain one or more organic solvents, such as the combination of one or more hydrocarbons, one or more alcohols, one or more amines, and one or more organic acids. Optionally, the nanoparticle paste formulations can contain about 0.01 to about 15 percent by weight micron-scale metal particles or other additives.

Abstract: There is provided a method for manufacturing a metal nanopowder having a uniform particle size distribution by uniformly applying current to the entirety of a metal raw material, while reducing energy usage, and an apparatus for manufacturing the same. The method includes disposing a metal foil in a reaction chamber; supplying direct current (DC) energy to the metal foil disposed in the reaction chamber; and supplying pulse energy to the metal foil to which the DC energy is supplied, thereby wire-exploding the metal foil.

Abstract: A coating method for the internal coating of a hollow body which includes producing a plasma jet from a working gas, supplying at least one precursor material to the working gas and/or to the plasma jet, introducing the plasma jet through a first opening into an interior of the hollow body and depositing at least one reaction product of at least one precursor on an inner surface of the hollow body and/or on at least one layer arranged on the inner surface. The method is carried out at atmospheric pressure. Furthermore, the first internal coating takes place without an activation process directly after a production process of the hollow body, in which the hollow body is formed with the supply of heat.

Abstract: The present invention relates to a method for manufacturing copper nanoparticles, in particular, to a method for manufacturing copper nanoparticles, wherein the method includes preparing a mixture solution including a copper salt, a dispersing agent, a reducing agent and an organic solvent; raising temperature of the mixture solution up to 30-50° C. and agitating; irradiating the mixture solution with microwaves; and obtaining the copper nanoparticles by lowering temperature of the mixture solution. According to the present invention, several tens of nm of copper nanoparticles having a narrow particle size distribution and good dispersibility can be synthesized in mass production.

Abstract: A metal fine particle for a conductive metal paste includes a protective agent covering a surface of the metal fine particle. An amount of heat generated per unit mass (g) of the metal fine particle is not less than 500 J at a temperature of an external heat source temperature in a range of 200° C. to 300° C. when being calcined by the external heat source. The protective agent includes at least one selected from the group consisting of dipropylamine, dibutylamine, triethylamine, tripropylamine, tributylamine, butanethiol, pentanethiol, hexanethiol, heptanethiol, octanethiol, nonanethiol, decanethiol, undecanethiol and dodecanethiol. The content of the protective agent is in a range of 0.1 to 20% by mass with respect to the mass of the metal fine particle.

Abstract: Provided is a process for producing satisfactory particles held in porous silica. The process comprises (a) the step of preparing porous silica, (b) the step of bringing the porous silica into contact with a liquid which contains either a metal or a compound that has the metal as a component element and infiltrating the liquid into the pores of the porous silica, and (c) the step of subjecting, after the step (b), the impregnated porous silica to a heat treatment to thereby form fine particles comprising the metal or the metal compound in the pores of the porous silica. When porous silica is synthesized by hydrolyzing an alkoxysilane in a solvent-free system, it is possible to synthesize porous silica having a fine pore diameter. Use of this porous silica as a template facilitates formation of particles (e.g., W, Cu, Cr, Mn, Fe, Co, or Ni or an oxide of any of these metals) that show peculiar properties not observed in the bulk material.

Abstract: Presently described are methods of inhibiting water vapor adsorption of a powder and methods of storing a powder at increased humidity level. The methods comprise providing adding discrete hydrophobic nanoparticles to a plurality of particles.

Abstract: Compositions containing tin nanoparticles and electrically conductive particles are described herein. The tin nanoparticles can have a size below about 25 nm so as to make the compositions fusable at temperatures below that of bulk tin (m.p.=232° C.). Particularly, when the tin nanoparticles are less than about 10 nm in size, the compositions can have a fusion temperature of less than about 200° C. The compositions can contain a whisker suppressant to inhibit or substantially minimize the formation of tin whiskers after tin nanoparticle fusion. In some embodiments, the compositions contain tin nanoparticles, electrically conductive particles comprising copper particles, and a whisker suppressant comprising nickel particles. Methods for using the present compositions are also described herein. The present compositions can be used as a lead solder replacement that allows rework to be performed.

Abstract: A nanoparticle composition comprises a ferromagnetic or superparamagnetic metal nanoparticle, and a functionalized carbonaceous coating on a surface of the ferromagnetic or superparamagnetic metal nanoparticle. A magnetorheological fluid comprises the nanoparticle composition.

Abstract: Solid-supported gold nanoparticles for use as a catalyst for the synthesis of quinolines from anilines and aldehydes using oxygen as an oxidant are provided. Also provided are a method for the preparation of SiO2-supported gold nanoparticles by in situ deposition of gold nanoparticles to silica gel and a method for synthesizing quinolines from anilines and aldehydes using oxygen as an oxidant.

Abstract: An ink composition for forming a chalcogenide semiconductor film and a method for forming the same are disclosed. The ink composition includes a solvent, a plurality of metal chalcogenide nanoparticles and at least one selected from the group consisted of metal ions and metal complex ions. The metal ions and/or complex ions are distributed on the surface of the metal chalcogenide nanoparticles and adapted to disperse the metal chalcogenide nanoparticles in the solvent. The metals of the metal chalcogenide nanoparticles, the metal ions and the metal complex ions are selected from a group consisted of group I, group II, group III and group IV elements of periodic table and include all metal elements of a chalcogenide semiconductor material.

Abstract: A maleimide-functionalized gold nanoparticle is described herein. More specifically, a maleimide-functionalized gold nanoparticle of formula (I): is described, wherein “n” and “m” are integers independently ranging from 1 to 100.

Abstract: A nanopowder and a method of making are disclosed. The nanopowder may be in the form of nanoparticles with an average size of less than about 200 nm and contain a reactive transition metal, such as hafnium, zirconium, or titanium. The nanopowder can be formed in a liquid under sonication by reducing a halide of the transition metal.

Abstract: Platinum (Pt)-based alloys are effective catalysts for oxygen reduction reaction (ORR) or fuel oxidation in proton exchange membrane fuel cells (PEMFCs). A wet-chemical approach for preparing monodisperse Pt3Ni, Pt3Co and Pt3Fe nanocubes and Pt3Ni nanoctahedra which are terminated with {100} and {111} facets, respectively, were developed. Such nanoscaled electrocatalysts supported on carbon black with controlled shape, e.g., octahedral configuration, is provided. ORR activity on the Pt3Ni nanoctahedra is ˜5.1 fold higher than that of nanocubes with a similar size, and their C-supported samples are highly active with respect to commercial Pt/C.

Abstract: Truncated ditetragonal gold prisms (Au TDPs) are synthesized by adding a dilute solution of gold seeds to a growth solution, and allowing the growth to proceed to completion. The Au TDPs exhibit the face-centered cubic crystal structure and are bounded by 12 high-index {310} facets. The Au TDPs may be used as heterogeneous catalysts as prepared, or may be used as substrates for subsequent deposition of an atomically thin layer of a platinum group metal catalyst. When the Au TDPs are used as substrates, the atomically thin layer of metal reproduces the high-index facets of the Au TDPs.

Abstract: The present invention relates to a method for preparing nitride nanomaterials, including: providing a first precursor and a second precursor, in which the first precursor is a transition metal precursor, a group IIIA precursor, a group IVA precursor or a mixture thereof, and a second precursor is a nitrogen-containing aromatic compound; and heating the first precursor with the second precursor to form a nitride nanomaterial. Accordingly, the present invention provides a simpler, nontoxic, more widely applied and low-cost method for preparing nitride nanomaterials.

Abstract: Systems and methods are disclosed herein for synthesizing ammonia using nano-size metal or metal alloy catalyst particles. Hydrogen and nitrogen gases are passed through a system comprising, for example, a bed of magnetite supporting nano-size iron or iron alloy catalyst particles having an optional oxide layer that forms the catalyst.

Abstract: A composition for the fabrication of reflective features using a direct-write tool is disclosed. The composition comprises metal nanoparticles having an average particle size less than 300 nm and which carry thereon a polymer for substantially preventing agglomeration of the nanoparticles, wherein the nanoparticles exhibit a metal-polymer weight ratio of 100:1 to 10:1. The composition further includes a vehicle for forming a dispersion with the metal nanoparticles. A number of electronic devices comprising a reflective layer formed from the composition are also disclosed. One example case provides an electronic device having a reflective electrode. The reflective electrode comprises a percolation network of the metal nanoparticles embedded in a matrix of the polymer and having an average particle size of less than 300 nm, wherein the reflective electrode is reflective in the visible light range and does not diffract incident light.

Abstract: A composition may have metal nanoparticles having a diameter of 20 nanometers or less and have a fusion temperature of less than about 220° C. A method of fabricating the metal nanoparticles may include preparing a solvent, adding a precursor with a metal to the solvent, adding a first surfactant, mixing in a reducing agent, and adding in a second surfactant to stop nanoparticle formation. Copper and/or aluminum nanoparticle compositions formed may be used for lead-free soldering of electronic components to circuit boards. A composition may include nanoparticles, which may have a copper nanocore, an amorphous aluminum shell and an organic surfactant coating. A composition may have copper or aluminum nanoparticles. About 30-50% of the copper or aluminum nanoparticles may have a diameter of 20 nanometers or less, and the remaining 70-50% of the copper or aluminum nanoparticles may have a diameter greater than 20 nanometers.

Abstract: There is provided a conductive paste composition for an internal electrode of a multilayered ceramic electronic component including: a metal powder; and a chrome (Cr) or cobalt (Co) powder having a melting point higher than that of the metal powder. In the conductive paste composition for the internal electrode, the sintering shrinkage temperature of the internal electrode may be increased, and the connectivity of the internal electrode may be improved.

Abstract: The present invention provides a method for preparing a medical device, preferably a contact lens, having an antimicrobial metal-containing LbL coating on a medical device, wherein the antimicrobial metal-containing LbL coating comprises at least one layer of a negatively charged polyionic material having —COOAg groups and/or silver nanoparticles formed by reducing Ag+ ions associated with the —COO? groups of the negatively charged polyionic material. In addition, the present invention provides a medical device prepared according to a method of the invention.

Abstract: Highly uniform silicon/germanium nanoparticles can be formed into stable dispersions with a desirable small secondary particle size. The silicon/germanium particles can be surface modified to form the dispersions. The silicon/germanium nanoparticles can be doped to change the particle properties. The dispersions can be printed as an ink for appropriate applications. The dispersions can be used to form selectively doped deposits of semiconductor materials such as for the formation of photovoltaic cells or for the formation of printed electronic circuits.

Abstract: Disclosed is a method suitable for large-scale producing silver nanostructures including nanoparticles and nanowires with high crystallization and purity in a short period of time. In this method, silver particles with mean diameter less than 200 nm and silver nanowires with length in micrometers are produced through a microwave-assisted wet chemistry method. Tens to hundreds grams of silver nanoparticles and nanowires are obtained in minutes by microwave irradiation treatment to a precursor pre-made by highly concentrated silver salt solution and other additives. These silver nanoparticles and nanowires have good dispersibility and are ideal for forming conductive adhesives.

Abstract: A series of binary and ternary Pt-alloys, that promote the important reactions for catalysis at an alloy surface; oxygen reduction, hydrogen oxidation, and hydrogen and oxygen evolution. The first two of these reactions are essential when applying the alloy for use in a PEMFC.

Abstract: Apparatus using gold nano-particle surface Plasmon resonance heating for a rapid, reagentless and site specific cleavage at the C-terminal of aspartic acid and at the N-terminus of the amino acid cysteine in peptides and proteins induced by the thermal decomposition at 220-250° C. for 10 s in solid samples.

Abstract: The present invention presents a mixture comprising charge-stabilized metallic nanoparticles and a photosensitizer, a method for making such mixture, and a method of using such mixture for killing or preventing the growth of microbes.

Abstract: In one embodiment of the present invention, inert nano-sized particles having dimensions from 1 nm to 1,000 nm are added into a solder ball. The inert nano-sized particles may comprise metal oxides, metal nitrides, metal carbides, metal borides, etc. The inert nano-sized particles may be a single compound, or may be a metallic material having a coating of a different material. In another embodiment of the present invention, a small quantity of at least one elemental metal that forms stable high melting intermetallic compound with tin is added to a solder ball. The added at least one elemental metal forms precipitates of intermetallic compounds with tin, which are dispersed as fine particles in the solder.

Abstract: An electrocatalyst for the electrochemical conversion of carbon dioxide to hydrocarbons is provided. The electrocatalyst for the electrochemical conversion of carbon dioxide includes copper material supported on carbon nanotubes. The copper material may be pure copper, copper and ruthenium, copper and iron, or copper and palladium supported on the carbon nanotubes. The electrocatalyst is prepared by dissolving copper nitrate trihydrate in deionized water to form a salt solution. Carbon nanotubes are then added to the salt solution to form a suspension, which is then heated. A urea solution is added to the suspension to form the electrocatalyst in solution. The electrocatalyst is then removed from the solution. In addition to dissolving the copper nitrate trihydrate in the deionized water, either iron nitrate monohydrate, ruthenium chloride or palladium chloride may also be dissolved in the deionized water to form the salt solution.

Abstract: The present invention is directed to a method for preparing colloidal dispersions of precious metal nanoparticles selected from the group consisting of Pt, Au, Pd, Ag, Rh, Ru and mixtures or alloys thereof, and to a method for isolating such precious metal nanoparticles from these colloidal dispersions. The colloidal dispersions are prepared by reducing suitable precious metal precursor compounds in aqueous alkaline solutions at reaction temperatures between 40 and 70° C. and a pH?12.0 in the presence of polysaccharides with average molecular weights (Mw) in the range of 300,000 to 1,000,000. The precious metal nanoparticles are isolated after decomposing the polysaccharide by heating the colloidal dispersions to temperatures >80° C. The nanoparticles can be used for the manufacture of core/shell-type catalyst materials and for electronic, decorative and medical applications.

Abstract: An inverse micelle-based method for forming nanoparticles on supports includes dissolving a polymeric material in a solvent to provide a micelle solution. A nanoparticle source is dissolved in the micelle solution. A plurality of micelles having a nanoparticle in their core and an outer polymeric coating layer are formed in the micelle solution. The micelles are applied to a support. The polymeric coating layer is then removed from the micelles to expose the nanoparticles. A supported catalyst includes a nanocrystalline powder, thin film, or single crystal support. Metal nanoparticles having a median size from 0.5 nm to 25 nm, a size distribution having a standard deviation ?0.1 of their median size are on or embedded in the support. The plurality of metal nanoparticles are dispersed and in a periodic arrangement. The metal nanoparticles maintain their periodic arrangement and size distribution following heat treatments of at least 1,000° C.

Abstract: A process for the production of an aqueous dispersion of metal nano particles comprising palladium is provided. The process comprises the admixture of a water soluble organic polymer, a palladium salt and a first reducing agent to an aqueous liquid. The first reducing agent is a metal-containing polymer which has reducing properties or a saccharide which has reducing properties. The nano particles can include a second metal. The dispersions can be used as catalysts for electroless plating, to produce heterogeneous catalysts and in the production of anti-microbial devices and compositions.

Abstract: Disclosed is a stimulated Raman scattering effect (SRS), amplifying optical fiber that includes a central core comprising a dielectric matrix that is capable of vibrating at a given frequency (?Raman) under the effect of a pump signal. The optical fiber includes at least one kind of metallic nanostructure that is capable of generating surface plasmon resonance (SPR) in the optical fiber. The metallic nanostructures have a shape and composition such that the frequency of their surface plasmon resonance (?plasmon) corresponds to the frequency of the pump signal (?pump) and/or the frequency of the optical signal transmitted in the optical fiber (?signal).

Abstract: A composition containing fine silver particles which have a uniform particle size, can form a fine drawing pattern, and have a small environmental impact, a method for producing that composition, a method for producing fine silver particles, and a paste having fine silver particles are provided. The fine silver particles are produced by carrying out a fluid preparation step of preparing a reduction fluid, a silver reaction step, and a filtration/washing step. The reaction step is carried out by adding an aqueous silver nitrate fluid to a reduction fluid whose temperature has been increased to a range between 40 and 800 ° C. The aqueous silver nitrate fluid is added at a stretch. The composition containing fine silver particles is produced by dispersing the composition containing the fine silver particles in a polar fluid.

Abstract: A semiconductor nanocrystal associated with a polydentate ligand. The polydentate ligand stabilizes the nanocrystal.

Abstract: A composite structure and a method of manufacturing the composite structure. The composite structure includes a graphene sheet; and a nanostructure oriented through the graphene sheet and having a substantially one-dimensional shape.

Abstract: A method for manufacturing metal nano particles having a hollow structure is provided. First, a suitable reducing agent is added into a first metal salt solution, and first metal ions are reduced to form first metal nano particles. Next, after the reducing agent is decomposed, a second metal salt solution with a higher reduction potential than that of the first metal is added. Then, the first metal particles are oxidized to form first metal ions when the second metal ions are reduced on the surface of the first metal by electrochemical oxidation reduction reaction, and thus, second metal nano particles having a hollow structure and a larger surface area are obtained. The method is simple and the metal nano particles with uniform particle size are obtained by this method.

Abstract: A paste composition for a solar cell electrode includes: a mixture of conductive powders, a glass frit, and an organic vehicle, and the mixture of conductive powders includes about 1 wt % to about 10 wt % of a first conductive powder having an average particle diameter (Dx) from about 1 nm to about 100 nm, and about 90 wt % to about 99 wt % of a second conductive powder having an average particle diameter (D50) from about 0.5 ?m to about 5 ?m.

Abstract: A filter (100) comprising at least one antibacterial layer (101) consisting of nano-silver particles and at least one ultraviolet photocatalytic layer (102).

Abstract: Low temperature gas-phase methods for the preparation of faceted aluminum crystals are disclosed.

Abstract: Improved mechanical properties of either clay or carbon nanotube (CNT)-reinforced polymer matrix nanocomposites are obtained by pre-treating nanoparticles and polymer pellets prior to a melt compounding process. The clay or CNTs are coated onto the surfaces of the polymer pellets by a milling process. The introduction of moisture into the mixture of the nanoparticles and the polymer pellets results in the nanoparticles more easily, firmly, and thoroughly coating onto the surfaces of the polymer pellets.

Abstract: A fuel additive composition includes: a) a reverse-micellar composition having an aqueous disperse phase that includes cerium dioxide nanoparticles in a continuous phase that includes a hydrocarbon liquid, a surfactant, and optionally a co-surfactant and b) a reverse micellar composition having an aqueous disperse phase that includes a cetane improver effective for improving engine power during fuel combustion. A method of making a cerium-containing fuel additive includes the step of: a) providing a mixture of a nonpolar solvent, a surfactant, and a co-surfactant; and b) combining the mixture with an aqueous suspension of stabilized cerium dioxide nanoparticles.

Abstract: The disclosure provide hollow nanospheres and methods of making and using the same. The methods and compositions of the disclosure are useful for drug delivery and gene transfer.

Abstract: The present invention provides a conductive composite comprising: suspension matrix, metal nanoparticles suspended within the suspension matrix, wherein the conductive composite has a conductivity greater than 104 S cm?1.

Abstract: A component including a substrate, at least one layer including a color conversion material including quantum dots disposed over the substrate, and a layer including a conductive material (e.g., indium-tin-oxide) disposed over the at least one layer. (Embodiments of such component are also referred to herein as a QD light-enhancement substrate (QD-LES).) In certain preferred embodiments, the substrate is transparent to light, for example, visible light, ultraviolet light, and/or infrared radiation. In certain embodiments, the substrate is flexible. In certain embodiments, the substrate includes an outcoupling element (e.g., a microlens array). A film including a color conversion material including quantum dots and a conductive material is also provided. In certain embodiments, a component includes a film described herein. Lighting devices are also provided. In certain embodiments, a lighting device includes a film described herein.

Abstract: Method and apparatus for storing hydrogen. One embodiment of such a method comprises providing a storage apparatus having a substrate and a nanostructure mat on at least a portion of a side of the substrate. The nanostructure mat comprises a plurality of nanostructures having a surface ionization state which causes more than one layer of hydrogen to adsorb onto the nanostructures. The method can also include exposing the nanostructure mat to hydrogen such that more than one layer of hydrogen adsorbs onto the nanostructures.

Abstract: A universal chirality sensor based on immuno-recognition-driven nanoparticle assembly has been fabricated. The design of smart 10 nm AuNP-antigen and 20 nmAuNP-antibody described for the detection of aflatoxin B1. 10 nm AuNP-antigen and 20 nmAuNP-antibody assemble to symmetric plasmonic nanoparticle dimers, which induced CD signal. The addition of aflatoxin B1 to the chirality sensor resulted in transverse CD signal compared to a blank control as shown by CD measurements. This process also allowed the rapid and facile determination of concentrations of aflatoxin B1 in drinking water (tap water). Good linearity for all calibration curves was obtained, and the limit of detection (LOD) for aflatoxin B1 was 0.02 ng/mL in tap water.