Abstract: A silver brazing material containing silver, copper, zinc, manganese, nickel, and tin as indispensable constituent elements. The silver brazing material includes 35 mass % or more and 45 mass % or less silver, 18 mass % or more and 28 mass % or less zinc, 2 mass % or more and 6 mass % or less manganese, 1.5 mass % or more and 6 mass % or less nickel, and 0.5 mass % or more and 5 mass % or less tin, with the balance being copper impurities. Within these compositional ranges, a predetermined relation is set between the manganese content and the nickel content, whereby the silver brazing material can be provided with excellent characteristics also in terms of processability or wettability. In the silver brazing material of the present invention, the silver content is reduced, and also melting point reduction and the narrowing of the temperature difference between solidus temperature and liquidus temperature are attempted.

Abstract: The present invention discloses the use of a metal nanoparticle which comprises at least one semiconductor attached to it, wherein the at least one semiconductor is an atomic quantum cluster (AQC) consisting of between 2 and 55 zero-valent transition metal atoms, as photocatalysts in photocatalytic processes and applications thereof.

Abstract: A system for dental restorations may comprise an abutment comprising an implant engaging portion and a component supporting portion terminating in a coronal end of the abutment. The implant engaging portion may extend apically from the component supporting portion and may have an external surface feature configured to be received in mating engagement within an opening in a dental implant. The component supporting portion may comprise at least one first snap-fit retention feature disposed on an outer peripheral surface of the component supporting portion. The system may further comprise a temporary coping made from a material that permits chemical bonding of the temporary coping with a veneering material of a temporary tooth restoration. The temporary coping may comprise at least one second snap-fit retention feature configured for snap-fit engagement with the at least one first snap-fit retention feature of the abutment.

Abstract: The present invention is directed to a formulation of one or more low silver containing alloys (including those with silver content below 50 weight %, “w %”) that show one of the group of distinct pink, yellow and green colors and further demonstrate enhanced resistance to tarnish and other beneficial features described herein.

Abstract: A gold alloy having, expressed by weight, about 24.5 to 25.5% Au, about 19.0 to 23.0% Ag, about 43.0 to 47.0% Cu, about 6.0 to 10.0% Zn, about 0.05 to 0.30% Si, and about 0.005 to 0.03% Ir. Alternatively, a alloy having, expressed by weight, about 16-17% Au, about 19-23% Ag, about 50-55% Cu, about 6-10% Zn, about 0.05-0.30% Si, and about 0.005-0.03% Ir.

Abstract: Identifying a stable phase of a binary alloy comprising a solute element and a solvent element. In one example, at least two thermodynamic parameters associated with grain growth and phase separation of the binary alloy are determined, and the stable phase of the binary alloy is identified based on the first thermodynamic parameter and the second thermodynamic parameter, wherein the stable phase is one of a stable nanocrystalline phase, a metastable nanocrystalline phase, and a non-nanocrystalline phase.

Abstract: A method of making dispersion-strengthened alloy particles involves melting an alloy having a corrosion and/or oxidation resistance-imparting alloying element, a dispersoid-forming element, and a matrix metal wherein the dispersoid-forming element exhibits a greater tendency to react with a reactive species acquired from an atomizing gas than does the alloying element. The melted alloy is atomized with the atomizing gas including the reactive species to form atomized particles so that the reactive species is (a) dissolved in solid solution to a depth below the surface of atomized particles and/or (b) reacted with the dispersoid-forming element to form dispersoids in the atomized particles to a depth below the surface of said atomized particles. The atomized alloy particles are solidified as solidified alloy particles or as a solidified deposit of alloy particles.

Abstract: A device including a near field transducer, the near field transducer including gold (Au) and at least one other secondary atom, the at least one other secondary atom selected from: boron (B), bismuth (Bi), indium (In), sulfur (S), silicon (Si), tin (Sn), hafnium (Hf), niobium (Nb), manganese (Mn), antimony (Sb), tellurium (Te), carbon (C), nitrogen (N), and oxygen (O), and combinations thereof erbium (Er), holmium (Ho), lutetium (Lu), praseodymium (Pr), scandium (Sc), uranium (U), zinc (Zn), and combinations thereof and barium (Ba), chlorine (Cl), cesium (Cs), dysprosium (Dy), europium (Eu), fluorine (F), gadolinium (Gd), germanium (Ge), hydrogen (H), iodine (I), osmium (Os), phosphorus (P), rubidium (Rb), rhenium (Re), selenium (Se), samarium (Sm), terbium (Tb), thallium (Th), and combinations thereof.

Abstract: A brazing material which can be melted at a suitable temperature at which damage is not given to a device inside a package upon sealing, and besides the brazing material is not remelted, e.g., upon mounting to a board, and which has a low temperature difference between a liquidus and a solidus. The brazing material is made of a Au—Ga—In ternary alloy, wherein weight concentrations of the elements lie within a region of a polygon with a point A (Au: 90%, Ga: 10%, In: 0%), a point B (Au: 70%, Ga: 30%, In: 0%), a point C (Au: 60%, Ga: 0%, In: 40%) and a point D (Au: 80%, Ga: 0%, In: 20%) as vertexes (excluding lines on which In and Ga become 0%), in a Au—Ga—In ternary phase diagram.

Abstract: The disclosure relates to pre-treatment of precious metal-bearing oxide ores, prior to precious metal leaching by thiosulfate. The process comprises mixing oxide ore in oxygenated water in the presence of a carbon-based material (e.g., activated carbon or other type of carbon). The carbon-based material can be separated from the ore slurry, and, the gold is thereafter leached by a thiosulfate lixiviant.

Abstract: Provided in one embodiment is a method of identifying a stable phase of an ordering binary alloy system comprising a solute element and a solvent element, the method comprising: determining at least three thermodynamic parameters associated with grain boundary segregation, phase separation, and intermetallic compound formation of the ordering binary alloy system; and identifying the stable phase of the ordering binary alloy system based on the first thermodynamic parameter, the second thermodynamic parameter and the third thermodynamic parameter by comparing the first thermodynamic parameter, the second thermodynamic parameter and the third thermodynamic parameter with a predetermined set of respective thermodynamic parameters to identify the stable phase; wherein the stable phase is one of a stable nanocrystalline phase, a metastable nanocrystalline phase, and a non-nanocrystalline phase.

Abstract: A method of producing metal flakes (72?) is provided. The method includes: applying a layer of ionic liquid (70) to a substrate (24); forming a layer of metal (70) on the substrate (24) over the ionic liquid (70); and removing the layer of metal (70) from the substrate (24).

Abstract: A mechanical structure is provided with a crystalline superelastic alloy that is characterized by an average grain size and that exhibits a martensitic phase transformation resulting from a mechanical stress input greater than a characteristic first critical stress. A configuration of the superelastic alloy is provided with a geometric structural feature of the alloy that has an extent that is no greater than about 200 micrometers and that is no larger than the average grain size of the alloy. This geometric feature undergoes the martensitic transformation without intergranular fracture of the geometric feature.

Abstract: Methods of producing metal nanowires, compositions, and articles are disclosed. Such methods allow production of metal nanowires with reproducibly uniform diameter and length, even in the presence of catalyst concentration variation. Such metal nanowires are useful for electronics applications.

Abstract: The present invention relates to a method for manufacturing at least one portion of a seal ensuring gas-tightness between at least one first and one second glass panel in a glazing system, the method including the following steps: depositing a first adhesive layer on a first peripheral area of the first panel and a second adhesive layer on a second peripheral area of the second panel; welding a first metal seal element to the first adhesive layer; welding a second metal seal element or said first metal seal element to the second adhesive layer. According to the invention, the first and second adhesive layers are deposited using a high-speed oxy-fuel flame-spraying method.

Abstract: The instant invention relates to easily isolable and re-dispersible transition metal nanoparticles, their manufacture and use as IR-absorbers, in particular in transparent thermoplastic or crosslinkable polymers. A further aspect of the invention is a composition of these transition metal nanoparticles and thermoplastic or crosslinkable polymers and an architectural or automotive glazing containing these transition metal nanoparticles.

Abstract: This invention relates to bio synthesis of novel nano gold through environment friendly process with the aid of plant materials classified under the taxonomical genus Dalbergia, Citrus, Ferula and Dolichos or Macrotyloma. The present inventive product novel nano gold finds utility in, the treatment of humans and animals, nutraceutical, cosmeceutical and herbal composition, the field of technology including but not limited to nano technology, green technology and bio technology. The invention also relates to the use of plant materials in the purification and particle size reduction of metals.

Abstract: A method for forming gold nanowires on a substrate is provided. The method includes a) attaching noble metal nanoparticles onto the substrate; and b) contacting the noble metal nanoparticles with an aqueous solution comprising a ligand, gold ions and a reducing agent, wherein the ligand is an organic compound having a thiol group. Gold nanowires formed by a method according to the method, and an electronic device comprising the gold nanowires are also provided.

Abstract: The instant invention relates to shaped transition metal particles, in particular in the form of a dispersion in an aqueous and/or organic medium, the manufacture thereof and their use as an infrared (IR) absorbing agent, an IR curing agent for coatings, an additive in conductive formulations, an antimicrobial agent or for sensoring organic and/or inorganic compounds. Further, the invention relates to dispersions comprising said shaped particles and an aqueous and/or organic medium, such as a thermoplastic or crosslinkable polymer, as well as to antimicrobial compositions and products.

Abstract: Provided by the present invention are a fine crystallite high-function metal alloy member, a method for manufacturing the same, and a business development method thereof, in which a crystallite of a metal alloy including a high-purity metal alloy whose crystal lattice is a face-centered cubic lattice, a body-centered cubic lattice, or a close-packed hexagonal lattice is made fine with the size in the level of nanometers (10?9 m to 10?6 m) and micrometers (10?6 m to 10?3 m), and the form thereof is adjusted, thereby remedying drawbacks thereof and enhancing various characteristics without losing superior characteristics owned by the alloy.

Abstract: There are disclosed a method of manufacturing fine metal powder and fine metal powder manufactured by using the same. The method of manufacturing fine metal powder includes forming a pattern having a predetermined size and shape on a base substrate, forming a metal film on the pattern, and separating the metal film from the pattern to obtain individual metal particles having a predetermined size and shape. The fine metal powder manufactured by the method has a uniform shape and a uniform particle size distribution. The fine metal powder is in the form of flakes, having a large ratio of particle diameter to thickness.

Abstract: Nanocrystals comprising organic ligands at surfaces of the plurality of nanocrystals are provided. The organic ligands are removed from the surfaces of the nanocrystals using a solution comprising a trialkyloxonium salt in a polar aprotic solvent. The removal of the organic ligands causes the nanocrystals to become naked nanocrystals with cationic surfaces.

Abstract: A dispersion liquid contains metal nanowires of excellent dispersion stability, and a conductive film that is formed using the dispersion liquid. This dispersion liquid is a dispersion liquid that contains metal nanowires. The metal nanowires are 10-200 nm in diameter, the coefficient of variation in diameter being less than 30%, and the ratio of the length to the diameter (length/diameter) being 10 or greater. The metal nanowires are metal members having as the principal constituent at least one metal selected from the group consisting of gold, nickel, and copper.

Abstract: An Au—Sn alloy bump that does not include large voids and a method of producing the same are provided. The Au—Sn alloy bump that does not include large voids comprises a composition containing Sn: 20.5 to 23.5 mass % and the balance Au and unavoidable impurities, and a structure where 0.5 to 30 area % of Sn-rich primary crystal phase is crystallized in the matrix.

Abstract: Methods employing novel solvents are disclosed for making metal nanostructures including metal nanowires. Such methods can be carried out at lower temperatures and higher production rates than those employing ethylene glycol. The products of these methods are useful for electronics applications.

Abstract: A method to recover gold lost in roaster calcine-leach tailings, due to the formation of cyanide refractory compounds or morphologies during the roasting process. The process can include acid leaching of magnetic concentrate from roaster leach tailings, combining the acid leach slurry to the pre-acidulation tank for pressure oxidation feed, acid pressure oxidation of the pressure oxidation feed, and recovery of gold.

Abstract: A light emitting diode chip a support layer having a first face and a second face opposite the first face, a diode region on the first face of the support layer, and a bond pad on the second face of the support layer. The bond pad includes a gold-tin structure having a weight percentage of tin of 50% or more. The light emitting diode chip may include a plurality of active regions that are connected in electrical series on the light emitting diode chip.

Abstract: A multimetallic nanoscale catalyst having a core portion enveloped by a shell portion and exhibiting high catalytic activity and improved catalytic durability. In various embodiments, the core/shell nanoparticles comprise a gold particle coated with a catalytically active platinum bimetallic material. The shape of the nanoparticles is substantially defined by the particle shape of the core portion. The nanoparticles may be dispersed on a high surface area substrate for use as a catalyst and is characterized by no significant loss in surface area and specific activity following extended potential cycling.

Abstract: Implantable electrically conductive devices are provided having a nanocomposite material coating comprising gold nanoparticles or carbon nanotubes. Such an implantable device may be a neural or other implantable prosthesis, including microelectrodes for use in vivo. The devices may have dimensions on a cellular scale. Further, the devices may be highly flexible and electrically conductive, while also having low impedance and high storage charge capacity. Layer-by-layer methods for fabricating such nanocomposite materials for implantable devices are also provided. Methods for direct-write lithography patterning of such nanocomposite material coatings are also provided.

Abstract: A gold-carbon compound that is a reaction product of gold and carbon, wherein the gold and the carbon form a single phase material that is meltable. The compound is one in which the carbon does not phase separate from the gold when the single phase material is heated to a melting temperature.

Abstract: A metal particle which is a non-nucleated, spherical porous material having continuous open pores, and which is formed from dendritic crystals which have grown uniformly outward from the center without requiring a nucleating agent. A method for producing a metal particle which includes the steps of: mixing a metal salt and a polycarboxylic acid in a liquid phase; adding a reducing agent to the resultant mixture to deposit metal particles; and drying the deposited metal particles. The metal particle produced by the method, which is a non-nucleated, spherical porous material having continuous open pores, is unlikely to suffer bonding or aggregation of the metal particles and exhibits excellent dispersibility, and, when the metal particle is used in a conductive composition, such as a conductive paste, a cured product having satisfactory conduction properties can be obtained at a relatively low temperature, making it possible to easily control the specific gravity or resistance.

Abstract: A thermal diffusion control film which includes an Ag alloy containing Nd, Bi, and Si. The thermal diffusion control film can be used for a magnetic recording medium for heat-assisted magnetic recording. The thermal diffusion control film has a good heat resistance even after heat hysteresis at about 600° C.

Abstract: The invention is directed to a process to prepare metal nanoparticles or metal oxide nanoparticles by applying a cathodic potential as an alternating current (ac) voltage to a solid starting metal object which solid metal object is in contact with a liquid electrolyte comprising a stabilising cation. The invention is also directed to the use of the nanoparticles as a catalyst.

Abstract: Compositions for forming Au-based bulk-solidifying amorphous alloys are provided. The Au-based bulk-solidifying amorphous alloys of the current invention are based on ternary Au—Cu—Si alloys, and the extension of this ternary system to higher order alloys by the addition of one or more alloying elements. Additional substitute elements are also provided, which allow for the tailoring of the physical properties of the Au-base bulk-solidifying amorphous alloys of the current invention.

Abstract: The present invention provides a method for producing gold nanoparticles using hydroxyl peroxide in an aqueous alkaline condition in the presence of a biocompatible protecting agent. The method of the invention does not involve toxic reagents and therefore are environmentally friendly. The gold nanoparticles thus produced can be used in biomedical applications including cancer therapy and drug delivery without purification.

Abstract: The invention concerns a gold alloy. It comprises at least 75% of gold, 0.5% to 2.1% of aluminium able to form precipitates with gold, an additional metal able to favour a stable face centred cubic structure and able to increase the solubility of aluminium in gold, and a precipitate selected to obtain a hardness of more than 250 HV. The selected precipitate of aluminium with gold is the aluminium and gold precipitate Al2Au5. It includes 0.5% to 2.1% of aluminium and a complement of additional metal including a majority of silver. The method of obtaining this alloy regulates the controlled growth of the precipitate during a structuring tempering treatment following dilution and hardening. The invention concerns the use of the aluminium and gold precipitate Al2Au5 for hardening a gold alloy. The invention concerns a timepiece or piece of jewellery including at least one component made of this type of alloy.

Abstract: An Au bonding wire for semiconductor device, comprising a wire-shaped Au alloy material consisting of: 3-15 mass ppm of Be, 3-40 mass ppm of Ca, 3-20 mass ppm of La, 3-20 mass ppm of at least one functional element selected from the group of Ce, Eu, Mg, and Si, and the remainder of Au, wherein the diameter of said Au alloy bonding wire is less than 23 microns, wherein said bonding wire has improved roundness of compressed bonded ball and improved fracture stress.

Abstract: Films and electronic devices can be released from metallic substrates by: (i) applying a coating of a polysilsesquioxane resin to a metallic substrate, (ii) heating the coated metallic substrate to a temperature sufficient to cure the polysilsesquioxane resin, (iii) applying a polymeric film to the cured coating on the metallic substrate, (iv) further heating the coated metallic substrate to a temperature sufficient to cure the polymeric film, (v) optionally fabricating electronic devices on the polymeric film, and (vi) releasing the polymeric film from the metallic substrate.

Abstract: The present invention provides a method of fabricating gold nanoparticles using electroless displacement plating, the method including the steps of: depositing on a substrate a metal having a reduction potential lower than that of gold to form a metal layer; and reacting a gold ion-containing plating solution with the metal layer. The invention also provides gold nanoparticles fabricated by the method. According to the method, gold nanostructures can be fabricated in a simple, cost-effective and efficient manner, and the fabricated gold nanoparticles can be used to measure surface-enhanced Raman scattering (SERS) signal or fluorescence. In addition, the invention enables the development of an optical sensor including the gold nanostructures.

Abstract: A porous catalyst layer formed from discrete particles of unsupported metal, wherein at least 80%, suitably at least 90%, of the discrete particles have a mass of from 1 to 1000 zeptograms, and wherein the catalyst layer has a metal volume fraction of less than 30% and a metal loading of less than 0.09 mg/cm2 is disclosed. The catalyst layer is suitable for use in fuel cells and other electrochemical applications.

Abstract: A novel multiband absorption based solar cell is disclosed by using the europium chalcogenides (EuX, X?O, S, Se, Te) and related magnetic semiconductor materials, in which an intermediate band is formed by the localized Eu 4f electrons between p-states of chalcogen ions and Eu s-d states. The energy gaps among the multibands can be in the spectral range of the sunlight, thus they can serve as better sunlight absorbers in solar cells than the conventional single band-gap semiconductors such as Si and GaAs. With these multiband semiconductors, the bottleneck in current power conversion efficiency can be potentially overcome in single junction photovoltaics.

Abstract: A drug having a muscle relaxing effect can be prepared by binding negatively charged gold nanoparticles having a size of 1.4 nm fitted to synaptic clefts to choline through ionic bonds, thereby inducing gold-sulfur bonds in the Cys loop of an acetylcholine receptor in neuromuscular junction, and thus blocking the electric current induced in signal transduction from a nerve to a muscle, thereby blocking neuromuscular transmission chemically and physically. When the reverse is administered after surgery, the gold-sulfur bonds are broken due to the re-flow of the electric current, and thus the gold nanoparticles are again released and metabolized into neuromuscular junction. Further, such muscle relaxing effect can be applied as an anticonvulsant.

Abstract: Methods employing novel solvents are disclosed for making metal nanostructures including metal nanowires. Such methods can be carried out at lower temperatures and higher production rates than those employing ethylene glycol. The products of these methods are useful for electronics applications.

Abstract: Methods of preparing nanowires having small diameters and large lengths are disclosed. Such nanowires are useful in electronics applications.

Abstract: Methods of preparing metal nanowire are disclosed that employ quaternary phosphonium salts. Such processes can produce long and thin nanowires. Compositions and articles comprising such nanowires are useful in electronics applications.

Abstract: The instant invention relates to shaped transition metal particles, in particular in the form of a dispersion in an aqueous and/or organic medium, the manufacture thereof and their use as an infrared (IR) absorbing agent, an IR curing agent for coatings, an additive in conductive formulations, an antimicrobial agent or for sensoring organic and/or inorganic compounds. Further, the invention relates to dispersions comprising said shaped particles and an aqueous and/or organic medium, such as a thermoplastic or crosslinkable polymer, as well as to antimicrobial compositions and products.

Abstract: Methods of the invention allow rapid production of high-porous, large-surface-area nanostructured metal and/or metal oxide at attractive low cost applicable to a wide variety of commercial applications such as sensors, catalysts and photovoltaics.

Abstract: Disclosed in this specification is a lead-free soldering alloy made of gold, tin and indium. The tin is present in a concentration of 17.5% to 20.5%, the indium is present in a concentration of 2.0% to 6.0% and the balance is gold and the alloy has a melting point between 290° C. and 340° C. and preferably between 300° C. and 340° C. The soldering alloy is particularly useful for hermetically sealing semiconductor devices since the melting temperature is sufficiently high to permit post-seal heating and sufficiently low to allow sealing of the semiconductor without causing damage.

Abstract: A method and system are provided in which a gold and/or silver-collecting resin-in-leach circuit comprises both co-current and counter-current sections.

Abstract: Nanomaterial preparation methods, compositions, and articles are disclosed and claimed. Such methods can provide nanomaterials with improved morphologies relative to previous methods. Such materials are useful in electronic applications.