The present disclosure provides for metal nanoparticles, such as gold nanoparticles that have six pointed areas so that the metal nanoparticle resembles a six-pointed star. The distance from opposing points of the six-pointed star is about 400 to 480 nanometers. The present disclosure also provides for a method of making the nanoparticle, where in an aspect, the method is a light-driven synthesis.

The present invention relates to an additive manufacturing powder material including Fe alloy particles each having an oxide film on a surface thereof, in which the Fe alloy particles satisfy d≤15 and I/d≤0.025, where d [nm] represents a thickness of the oxide film, and a peak intensity ratio I represents an intensity ratio IB/IA of a peak B in a region B of a Raman shift of 1,309 to 1,329 cm.sup.−1 to a peak A in a region A of a Raman shift of 657.5 to 677.5 cm.sup.−1 in a Raman spectrum.

Composite compositions comprising metal nanoparticles and/or microparticles and a binder are provided. Composites are tunable to achieved specific desired characteristics, such as sintering temperature, melting temperature, print resolution, and surface binding capabilities. Preferably, the metal particles may be produced using plasma-based technology. The composites are spreadable or printable and are especially useful in the field of electronics. The composites are capable of being used to form highly conductive wires or traces in electronic components. Preferably, the resulting metal structure has a low level of metal oxidation. The disclosure also includes methods for producing composite materials.

A method for preparing gold metal nanoparticles, e.g., nanospheres and nanoprisms, includes combining an extract of red algae with chloroauric acid (HAuCl.sub.4). The red algae can be Laurencia papillosa. The extract can include a water solvent extract. The chloroauric acid (HAuCl.sub.4) can be in an aqueous solution. The method can include providing chloroauric acid

(HAuCl.sub.4), providing a red algae extract, and combining the chloroauric acid (HAuCl.sub.4) and the red algae extract to produce gold nanoparticles.

A method for preparing copper nanocubes with specific facets and uniform size, the method comprising combining a copper complex solution in a reaction mixture with a ligand. Using a ligand of pure, unoxidized tributylphosphine, uniform copper nanocubes with six facets are prepared.

The present disclosure relates generally to wires and more particularly to textured powder wires containing nanoscale metallic silver powder. The invention presents an improvement of the process of making compressed cores of textured-powder high-temperature superconductor previously using the micaceous high-temperature superconductor Bi-2212. Embodiments of the claimed methods are useful with the micaceous high-temperature superconductors, notably Bi2Sr2CaCu208+x (Bi-2212) and Bi2S-r2Ca2Cu3O10+x (Bi-2223) and rare earth barium copper oxide (REBCO).

The present application relates to hollow metal nano particles.

The present invention provides a silver nano-particle production method which is safe and simple also in terms of scaled-up industrial-level production, in a so-called thermal decomposition method in which a silver-amine complex compound is thermally decomposed to form silver nano-particles. A method for producing silver nano-particles comprising: mixing an aliphatic hydrocarbon amine and a silver compound in the presence of an alcohol solvent having 3 or more carbon atoms to form a complex compound comprising the silver compound and the amine; and thermally decomposing the complex compound by heating to form silver nano-particles.

The present invention discloses a method for continuously preparing noble metal and alloy nanoparticles thereof, and belongs to the technical field of preparation of inorganic nanomaterials. A three-way quartz tube microreactor is designed; noble metal solutions used as raw materials are continuously inputted into the microreactor by injection pumps; and a plasma technology is coupled to form discharge in the microreactor to directly prepare noble metal and alloy nanoparticles thereof. The device and the method of the present invention have low energy consumption, wide operation range, safety, high efficiency, green and environmental protection. The synthesized nanoparticles have high purity, small size, narrow particle size distribution and adjustable components.

This invention provides metal nanoparticles (e.g., aluminum, chromium, iron and magnesium) having an epoxide-based oligomer coating, compositions thereof, method of making the same, and methods of use thereof, including for energy related applications.