Abstract: The present invention relates to ink formulations based on silver nanoparticles. In particular, the present invention relates to ink formulations based on silver nanoparticles, said inks being stable, with improved conductivity and particularly suitable for the field of contactless inkjet printing.

Abstract: An exemplary printable composition comprises a liquid or gel suspension of a plurality of metallic nanofibers or nanowires; a first solvent; and a viscosity modifier, resin, or binder. In various embodiments, the metallic nanofibers are between about 10 microns to about 100 microns in length, are between about 10 nm to about 120 nm in diameter, and are typically functionalized with a coating or partial coating of polyvinyl pyrrolidone or a similar compound. An exemplary metallic nanofiber ink which can be printed to produce a substantially transparent conductor comprises a plurality of metallic nanofibers; one or more solvents such as 1-butanol, ethanol, 1-pentanol, n-methylpyrrolidone, cyclohexanone, cyclopentanone, 1-hexanol, acetic acid, cyclohexanol, or mixtures thereof; and a viscosity modifier, resin, or binder such as polyvinyl pyrrolidone or a polyimide, for example.

Abstract: The present disclosure provides a microwave-assisted carbon template method for preparing supported nano metal-oxides or nano metals. The method includes mixing a carbohydrate, urea, and a precursor of an oxide support with a metal salt in a container, adding a certain amount of water, and completely dissolving the solid chemicals through ultrasonic stirring to form a homogeneous solution. The method also includes performing microwave treatment on the obtained solution for approximately 0.1 minute to 60 minutes with a microwave heating power in a range of approximately 100 W to 50 kW to dehydrate and carbonize the carbohydrate and thus form a dark brown solid. The method further includes performing heat treatment on the dark brown solid at a temperature in a range of approximately 200° C. to 1100° C. in an air atmosphere for approximately 0.5 hour to 24 hours to obtain a metal-oxide supported by a porous oxide support.

Abstract: A method for forming nanoparticles includes forming a stack of alternating layers including a first material disposed between a second material. The stack of alternating layers is patterned to form pillars. A dielectric layer is conformally deposited over the pillars. The pillars are annealed in an oxygen environment to modify a shape of the first material of the alternating layers. The dielectric layer and the second material are etched selectively to the first material to form nanoparticles from the first material.

Abstract: The present invention relates to a nano-metal particles and a preparation process thereof. Specifically, the nano-metal particles are prepared by a process comprising the steps of: a) providing a solution of a metal precursor; b) providing a mother liquor comprising a reducing agent; c) atomizing the solution of the metal precursor; and d) allowing the metal precursor to react with a reducing agent to form the nano-metal particles, wherein the metal precursor has a higher solubility in the first solvent than in the mother liquor. The present process for preparing nano-metal particles not only has the advantages of the traditional liquid phase chemical reduction process such as simple equipment, easy availability of raw materials, low cost, easy control of conditions, high yield, large output and the like, but also may produce the nano-metal particles having a very desirable particle size and particle size distribution.

Abstract: Provided is a method of recovering gold, and optionally silver, from gold-bearing, and optionally silver-bearing, double refractory raw material, comprising the steps of (a) leaching the gold-bearing, and optionally silver-bearing, double refractory raw material in a chloride containing leaching solution to dissolve gold and to obtain a leach solution comprising gold, and optionally silver, in solution, whereby the redox of leaching solution in the chloride leaching step is above 550 mV vs. Ag/AgCl; and simultaneously contacting the leach solution comprising gold, and optionally silver, in solution with a re-sorptive material to obtain a gold-containing, and optionally silver-containing, re-sorptive material; and (b) recovering gold and optionally silver from the gold-containing, and optionally silver-containing, re-sorptive material.

Abstract: A method for forming nanoparticles includes forming a stack of alternating layers including a first material disposed between a second material. The stack of alternating layers is patterned to form pillars. A dielectric layer is conformally deposited over the pillars. The pillars are annealed in an oxygen environment to modify a shape of the first material of the alternating layers. The dielectric layer and the second material are etched selectively to the first material to form nanoparticles from the first material.

Abstract: The present invention relates to colloidal dispersions comprising a plurality of precious group nanoparticles, wherein about 90% or more of the precious group metal is in fully reduced form; a dispersion medium comprising a polar solvent; a water-soluble polymer suspension stabilizing agent; and a reducing agent, wherein the nanoparticle concentration is at least about 2 wt. % of the colloidal dispersion, wherein the nanoparticles have an average particle size of about 1 to about 6 nm and at least 95% of the nanoparticles have a particle size within this range; and further wherein the colloidal dispersion is substantially free of halides, alkali metals, alkaline earth metals and sulfur compounds. Methods of preparing, further processing, and using such colloidal dispersions are also provided herein.

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: A silver particle synthesizing method includes reducing a dispersant from first silver particles each covered with the dispersant to obtain second silver particles. The method further includes synthesizing third silver particles each having a larger particle diameter than the second silver particles by causing a reaction between a silver compound and a reductant in a liquid phase containing the second silver particles.

Abstract: Methods for making a plurality of nanoparticles are provided. The method may include flowing a first component of the core into a reaction chamber; flowing a polymeric material into the reaction chamber; and flowing a second component of the core into the reaction chamber such that the first component reacts with the second component to form a core. The polymeric material forms a polymeric shell around the core.

Abstract: A method of producing a workpiece includes: providing a first powder, with a hardness of the first powder being less than 250 HV, and with a mean particle size of the first powder being less than 20 ?m; mixing the first powder and a second powder to form a mixed powder, with the mixed powder including carbon, chromium, iron, and elements selected from the group consisting of molybdenum, nickel, copper, niobium, vanadium, tungsten, silicon, cobalt, and manganese; adding a binder and water to the mixed powder; applying a spray drying process to granulate the mixed powder to form a spray-dried powder; applying a dry pressing process to the spray-dried powder to form a green part; applying a debinding process to the green part to form a debound body; and sintering the debound body into a workpiece having a hardness of higher than 250 HV.

Abstract: Methods are described that include reacting a starting nanocrystal that includes a starting nanocrystal core and a covalently bound surface species to create an ion-exchangeable (IE) nanocrystal that includes a surface charge and a first ion-exchangeable (IE) surface ligand ionically bound to the surface charge, where the starting nanocrystal core includes a group IV element.

Abstract: A composition having nanoparticles of a refractory-metal carbide or refractory-metal nitride and a carbonaceous matrix. The composition is not in the form of a powder. A composition comprising a metal component and an organic component. The metal component is nanoparticles or particles of a refractory metal or a refractory-metal compound capable of decomposing into refractory metal nanoparticles. The organic component is an organic compound having a char yield of at least 60% by weight or a thermoset made from the organic compound. A method of combining particles of a refractory metal or a refractory-metal compound capable of reacting or decomposing into refractory-metal nanoparticles with an organic compound having a char yield of at least 60% by weight to form a precursor mixture.

Abstract: Optoelectronic devices with enhanced internal outcoupling include a substrate, an anode, a cathode, an electroluminescent layer, and an electron transporting layer comprising inorganic nanoparticles dispersed in an organic matrix.

Abstract: A process for making silver nanostructures, which includes the step of reacting at least one polyol and at least one silver compound that is capable of producing silver metal when reduced, in the presence of: (a) a source of chloride or bromide ions, and (b) at least one copolymer that comprises: (i) one or more first constitutional repeating units that each independently comprise at least one pendant saturated or unsaturated, five-, six-, or seven-membered, acylamino- or diacylamino-containing heterocylic ring moiety per constitutional repeating unit, and (ii) one or more second constitutional repeating units, each of which independently differs from the one or more first nonionic constitutional repeating units, and has a molecular weight of greater than or equal to about 500 grams per mole, is described herein.

Abstract: A composition having nanoparticles of a refractory-metal carbide or refractory-metal nitride and a carbonaceous matrix. The composition is not in the form of a powder. A composition comprising a metal component and an organic component. The metal component is nanoparticles or particles of a refractory metal or a refractory-metal compound capable of decomposing into refractory metal nanoparticles. The organic component is an organic compound having a char yield of at least 60% by weight or a thermoset made from the organic compound. A method of combining particles of a refractory metal or a refractory-metal compound capable of reacting or decomposing into refractory-metal nanoparticles with an organic compound having a char yield of at least 60% by weight to form a precursor mixture.

Abstract: Methods for producing silver nanostructures with improved dimensional control, yield, purity, monodispersity, and scale of synthesis.

Abstract: The invention relates to a process for recovering at least one platinoid element contained in an acidic aqueous solution comprising chemical elements other than the platinoid element, the process comprising the steps of (a) bringing the acidic aqueous solution into contact with a reducing amount of a reducing agent which is a non-sulphurous and non-glucidic alcoholic compound chosen from cyclic, optionally aromatic, alcohols and aliphatic polyols, which reduces the platinoid element to its 0 oxidation state; and (b) separating the reduced platinoid element from the acidic aqueous solution.

Abstract: Nanowire preparation methods, compositions, and articles are disclosed. Such methods, which reduce metal ions to metal nanowires in the presence of zero-valent metal atoms, are capable of producing long, narrow, nanowires useful for electronics and optical applications.

Abstract: The present invention provides a method for reducing metal ions (for example, silver ions) and stably dispersing metal nanoparticles by nanosilicate platelets. An organic dispersant, nanosilicate platelets and a metal ionic solution are mixed to perform a reductive reaction, wherein the organic dispersant is tri-sodium citrate dihydrate (SCD), chitosan or polyvinyl pyrrolidone (PVP), to produce a mixture of stably dispersed metal nanoparticles.

Abstract: Spherical particles of one or more elemental metals and elemental carbon are prepared from a precursor in the form of a metal oleate. The metal oleate precursor is dispersed in a liquid vehicle and aerosol droplets of the dispersed precursor are formed in a stream of an inert gas. The aerosol droplets are heated in the stream to decompose the oleate ligand portion of the precursor and form spherical particles that have a mesoporous nanocrystalline structure. The open mesopores of the spherical particles provide a high surface area for contact with fluids in many applications. For example, the mesopores can be infiltrated with a hydrogen absorbing material, such as magnesium hydride, in order to increase the hydrogen storage capacity of the particles.

Abstract: A compound having the moiety M-[(C?C)n-M?]m. Each M and each M? is a transition metal. Each n is 1 or 2, and m is 2 or more. A method of reacting a transition metal halide with 1,2-dilithioacetylene or 1,4-dilithiodiacetylene to form a transition metal compound.

Abstract: A method of synthesizing carbon-magnetite nanocomposites. In one embodiment, the method includes the steps of (a) dissolving a first amount of an alkali salt of lignosulfonate in water to form a first solution, (b) heating the first solution to a first temperature, (c) adding a second amount of iron sulfate (FeSO4) to the first solution to form a second solution, (d) heating the second solution at a second temperature for a first duration of time effective to form a third solution of iron lignosulfonate, (e) adding a third amount of 1N sodium hydroxide (NaOH) to the third solution of iron lignosulfonate to form a fourth solution with a first pH level, (f) heating the fourth solution at a third temperature for a second duration of time to form a first sample, and (g) subjecting the first sample to a microwave radiation for a third duration of time effective to form a second sample containing a plurality of carbon-magnetite nanocomposites.

Abstract: A process for synthesizing metal submicron and nano-scale powders for use in articles of manufacture. In a suitable reactor, single metal or multiple metal complexes are heated to a temperature whereby, upon contact with hydrogen gas, an exothermic reaction begins. The further temperature rise in response to the exothermic reaction is minimized by reducing the external heat input, thereby minimizing the agglomeration or sintering of the metal nano-scale particles resulting from the process. Preferably, after drawing a vacuum on the metal complexes in the reactor, the hydrogen is introduced at about, equal to or below ambient pressure and the reaction is purposely made slow to prevent agglomeration or sintering.

Abstract: Integrated process, in which pure carbonyl iron powder (CIP) is prepared by decomposition of pure iron pentacarbonyl (IPC) in a plant A, carbon monoxide (CO) liberated in the decomposition of the IPC is used in plant A for the preparation of further CIP from iron or is fed to an associated plant B for the preparation of synthesis gas or is fed to an associated plant C for the preparation of hydrocarbons from synthesis gas, and the CIP prepared in plant A is used as catalyst or catalyst component in an associated plant C for the preparation of hydrocarbons from synthesis gas from plant B.

Abstract: Processes for the production of metal nanoparticles. In one aspect, the invention is to a process comprising the steps of mixing a heated first solution comprising a base and/or a reducing agent (e.g., a non-polyol reducing agent), a polyol, and a polymer of vinyl pyrrolidone with a second solution comprising a metal precursor that is capable of being reduced to a metal by the polyol. In another aspect, the invention is to a process that includes the steps of heating a powder of a polymer of vinyl pyrrolidone; forming a first solution comprising the powder and a polyol; and mixing the first solution with a second solution comprising a metal precursor capable of being reduced to a metal by the polyol.

Abstract: Hydrophobic metal nanoparticles are prepared by reducing a metal precursor in a non-polar or low polar organic solvent with or without volume expansion by adding CO2.

Abstract: A method of producing carbon-metal nanocomposites includes (a) treating a material containing at least one o-catechol unit with a first solution of hexamine such that the material becomes hexamine treated; (b) treating the material with a second solution having a plurality of metal ions such that the material becomes metal treated; (c) treating the material with a third solution of alkali such that the material becomes alkali treated; and (d) heating the alkali, metal and hexamine treated material after (a), (b), and (c) for a predetermined period of time such that a plurality of carbon-metal nanocomposites having metal nanoparticles dispersed in the material are produced.

Abstract: The present invention relates to a process for preparing uniform silver nanoparticles. In particular, the present invention is directed to a process for preparing silver nanoparticles comprising: (i) heating a mixture of a silver precursor and a surfactant under inert atmosphere to prepare silver nanoparticles; and (ii) separating the silver nanoparticles from the reaction products of the step (i).

Abstract: A method for generating metallic nanomaterials using acetylenic-bridged metal-carbonyl complexes as a precursor allows control of nanoparticle properties. The novel method produced metallic nanomaterials resistant to oxidation.

Abstract: Iron-comprising heterogeneous catalyst and a process for producing it, which comprises the steps of thermal decomposition of gaseous iron pentacarbonyl to give carbonyl iron powder having spherical primary particles, treatment of carbonyl iron powder with hydrogen, resulting in the metallic spherical primary particles at least partially forming agglomerates, contacting the agglomerates with iron pentacarbonyl, and thermal decomposition of the iron pentacarbonyl to give at least predominantly pore-free and void-free secondary particles.

Abstract: A method for immobilizing a self-organizing material or fine particles on a substrate, and a substrate whereupon the self-organizing material or the fine particles are immobilized. More specifically, the method for immobilizing the fine particles including a nucleic acid (for instance, DNA or RNA) or a metal oxide on the substrate, and the substrate whereupon the nucleic acid (for example, DNA or RNA) or the metal oxide is immobilized.

Abstract: A method to synthesize tungsten nanoparticles has been developed that enables synthesis of nanometer-scale, monodisperse particles that can be stabilized only by tetrahydrofuran. The method can be used at room temperature, is scalable, and the product concentrated by standard means. Since no additives or stabilizing surfactants are required, this method is particularly well suited for producing tungsten nanoparticles for dispersion in polymers. If complete dispersion is achieved due to the size of the nanoparticles, then the optical properties of the polymer can be largely maintained.

Abstract: Dispersed uniform spherical silver particles were prepared in the absence of a protective colloid by rapidly mixing concentrated iso-ascorbic acid and silver-polyamine complex solutions.

Abstract: Methods of making metal-terephthalate polymers from a polyester ethylene terephthalate or terephthalic acid produces high yield and high purity reaction products for a range of metals. Among the preferred metal compounds employed in the processes are metal oxides and metal hydroxides. The methods are preferably carried out at a low pressure and can produce metal-terephthalate polymer powders containing small crystals which can be employed to enhance properties of polymers or disperse metals in specific applications by thermal decomposition of metal-terephthalate polymers.

Abstract: A preparation method of a copper particle composition includes dissolving a copper carboxyl compound, or a carboxyl group-containing compound and a copper salt, in a solvent to prepare a copper(II) precursor solution; putting a weak reducing agent with a standard reduction potential of ?0.2 to ?0.05V to the prepared copper(II) precursor solution to assemble a plurality of Cu2O fine particles having an average diameter of 1 to 100 nm with a standard deviation of 0 to 10%, thereby forming spherical Cu2O assembly particles having an average diameter of 0.1 to 10 ?m with a standard deviation of 0 to 40%; reducing the spherical Cu2O assembly particles into copper particles by using a reducing agent; and separating the copper particles from the result product. Thus, copper particles can be produced fast, economically, and the obtained copper particles have good crystallinity and good resistance against oxidation.

Abstract: A color photoresist with gold nanoparticles and color filters made therefrom are provided. The color photoresist with gold nanoparticles includes substituted acrylate monomers, gold nanoparticles (or clusters), surfactants and a photo-polymerization initiator. The color filter includes a polyacrylate, gold nanoparticles (or clusters) and surfactants. The gold nanoparticles (or clusters) can be dispersed in the color photoresist or the color filter by the surfactants.

Abstract: The present invention relates the manufacture of metal powders, non-oxidic ceramic powders and reduced metal oxide powders using an improved flame spray pyrolysis (“FSP”) process. The invention further relates to an apparatus specifically adapted to said process, to powders/naoncomposites obtained by said process and to the use of said powders/nanocompsites.

Abstract: A process for synthesizing carbon-metal nanocomposites. In one embodiment, the process includes the steps of preparing a metal derivative or a metal chelated derivative of a carbon-containing precursor in solid form, and subjecting the metal derivative or metal chelated derivative of a carbon-containing precursor in solid form to microwave radiation at a frequency in the range of 900 MHz to 5.8 GHz, for a period of time effective to generate a heat flow from inside of the metal derivative or metal chelated derivative of a carbon-containing precursor in solid form to the outside such that the temperature of the metal derivative or metal chelated derivative of a carbon-containing precursor in solid form reaches 1,000° C. in less than 6 minutes with a temperature (T) derivative over time (t), ?T/?t, no less than 2.5° C./second to form carbon-metal nanocomposites.

Abstract: It provides a method for preparing metal nanoparticles using a metal seed and metal nanoparticles including the metal seed, the method including: preparing a solution by adding a polymer surfactant in an alcohol solvent; heating the solution; forming a metal seed by adding a first metal salt of at least one metal salt selected from the group consisting of platinum, palladium and iridium in the heated solution; and adding a second metal salt into the solution including the metal seed. This method allows the production of uniform-sized nanoparticles under high concentration conditions in high yield and mass production in which the metal nanoparticles have high dispersion stability so that they are suitable for various application.

Abstract: The reactor is used for producing nano-particles of metal from volatile moieties in flow through mode. The reactor comprises at least a first feeder and a second feeder on one end of the vessel. The first feeder feeds the moiety in the form of an educt fluid into the reactor. This fluid is a mixture of metal moieties and a bearer fluid, entering the reactor in a vaporized state, in which the bearer fluid is used as a carrier gas. The second feeder is used as a radiator means to heat up the educt fluid within the reactor. By providing the heating fluid through the second feeder control over some environmental conditions like ambient temperature within the reactor is achieved and dissociation of the metal moieties under such controlled conditions leads to quantitative production of selected nano-particle morphologies.

Abstract: A production complex is used for producing nano-particles of metal from volatile moieties like metal carbonyls in a flow through reactor. The carbonyls are fed into the reactor through a first feeder, which is a moiety feeder. The moiety, a mixture of metal carbonyl and a bearer fluid, is entering the reactor in a vaporized state. Decomposition of carbonyls is carried out by controlled ambient temperature within the reactor, which is provided by means of a heated inert gas through a heating feed line of the production complex into a second feeder of the reactor, when the production complex is in an operational state. Gases like nitrogen are heated up in units of the production complex as heating feed. The gas supply unit in pre-operational state is used to provide inert gas for cleaning a carbonyl feed line in order to improve the quality of nano-particles of metal produced.

Abstract: Disclosed herein is a method for synthesizing a nanoparticle using a carbene derivative. More specifically, provided is a method for synthesizing a nanoparticle by adding one or more precursors to an organic solvent to grow a crystal, wherein a specific carbene derivative is used as the precursor.

Abstract: An object of this invention is to provide a manufacturing method of metal nanowire in which a length and a diameter can be uniformly controlled, metal nanowire having excellent form uniformity, and a transparent electric conductor exhibiting excellent conductivity and transparency by employing metal nanowire having excellent conductivity and transparency. A manufacturing method of metal nanowire which reduces a metal ion in a solution to form metal particles having a wire-form, wherein a nucleus forming process and a particle growth process after said nucleus forming process are provided, and said nucleus forming process reduces a metal ion to form reduced metal, which is directly precipitated on the surface of said particles formed in the said nucleus forming process or on the surface of particles having grown from said nucleus particles during a growth process, whereby metal particles are formed.

Abstract: This invention relates to organometallic precursor compounds represented by the formula (Cp(R?)x)yM(H)z-y, a process for producing the organometallic precursor compounds, and a method for depositing a metal and/or metal carbide layer, e.g., Ta metal and/or TaC layer, on a substrate by the thermal or plasma enhanced disassociation of the organometallic precursor compounds, e.g., by CVD or ALD techniques. The metal and/or metal carbide layer is useful as a liner or barrier layer for conducting metals and high dielectric constant materials in integrated circuit manufacturing.

Abstract: Hydrophobic metal nanoparticles are prepared by reducing a metal precursor in a non-polar or low polar organic solvent with or without volume expansion by adding CO2.

Abstract: To provide a composition with which a metal film can be directly produced from a high-valent metal compound, a method for producing a metal film, and a method for producing a metal powder. Using a composition for production of a metal film of copper, silver or indium, which comprises a high-valent compound of copper, silver or indium, a linear, branched or cyclic C1-18 alcohol and a Group VIII metal catalyst, a coating film is formed, followed by reduction by heating to produce a metal film of copper, silver or indium. Further, using metal particles of silver, copper of indium having a surface layer comprising a high-valent compound of copper, silver or indium, instead of the high-valent compound of copper, silver or indium, a metal film of copper, silver or indium is produced in the same manner as above.

Abstract: A process for synthesizing metal nanopowders by introducing metal carbonyl into an induction plasma torch. By taking advantage of the much lower dissolution temperature of carbonyl as opposed to the high melting temperature of conventional metal powder feeds less torch power is required. Moreover, in contrast to current powder production techniques utilizing electrode based plasma torches, the induction plasma torch does not introduce contaminants into the nanopowder.

Abstract: Disclosed herein are methods and processes for making FeRh/FePt nanostructures and the use of these FeRh—FePt nanostructures as a magnetic recording media.