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.

The present invention provides a preparation method for gold nanoparticles based on functionalized ionic liquid. The method comprises synthesizing a functionalized ionic liquid, 3-(12-bromo-dodecyl)-1-(3-pyrrole propyl)-imidazole bromide, as a stabilizer for synthesizing gold nanoparticles, adjusting the concentration of the ionic liquid and the dosage of the reducing agent, thereby successfully preparing the icosahedral gold nanoparticles, and characterizing the morphology thereof by TEM, XRD and SEM. In the present invention, the method employed for preparing the stabilizer is simple, non-toxic, harmless and pollution-free, moreover the preparation of gold nanoparticles by aqueous phase has the advantages of mild conditions, short reaction time, simple operation, green and pollution-free, and belongs to the environment-friendly preparation.

The present specification relates to a method for preparing a metal nanoparticle.

A process is described for preparing stable suspensions of metal nanoparticles by means of a microwave-assisted metal nanoparticle synthesis undertaken in an aqueous environment at low temperature and at ambient pressure and atmosphere.

A process is described for preparing stable suspensions of metal nanoparticles by means of a microwave-assisted metal nanoparticle synthesis undertaken in an aqueous environment at low temperature and at ambient pressure and atmosphere.

There is provided conductive paste excellent in electro-conductivity and thermal conductivity. Conductive paste comprising conductive filler being composite particles including copper powder and nanosize precipitates which are disposed on the surface of the copper powder and composed of at least one kind of transition metal belonging to the group 8 to group 10 of the periodic table or a compound of the transition metal, and a binder resin.

Metallic copper fine particles coated with a fatty acid and an ester compound. Also disclosed is an antiviral agent containing the metallic copper fine particles and a method for producing the metallic copper fine particles.

Provided is a silicon bulk thermoelectric conversion material in which thermoelectric performance is improved by reducing the thermal conductivity as compared with the prior art. In the silicon bulk thermoelectric conversion material, the ZT is greater than 0.2 at room temperature with the elemental silicon. In the silicon bulk thermoelectric conversion material, a plurality of silicon grains have an average of 1 nm or more and 300 nm or less, a first hole have an average of 1 nm or more and 30 nm or less present in the plurality of silicon grains and surfaces of the silicon grains, and a second hole have an average of 100 nm or more and 300 nm or less present between the plurality of silicon grains, wherein the aspect ratio of a crystalline silicon grain is less than 10.

With an aim to provide a method for producing an oxide particle with controlled color characteristics and also provide an oxide particle with controlled color characteristics, the present invention provides a method for producing an oxide particle, wherein the color characteristics of the oxide particle are controlled by controlling a ratio of an M-OH bond between an element (M) and a hydroxide group (OH) or an M-OH bond/M-O bond ratio, where the element (M) is one element or plural different elements other than oxygen or hydrogen included in the oxide particle selected from metal oxide particles and semi-metal oxide particles. According to the present invention, by controlling the M-OH bond or the M-OH bond/M-O bond ratio of the metal oxide particle or the semi-metal oxide particle, the oxide particle with controlled color characteristics of any of reflectance, transmittance, molar absorption coefficient, hue, and saturation can be provided.

Disclosed is a method for preparing vanadium or vanadium alloy powder from a vanadium-containing raw material through a shortened process, including: calcinating a mixture of a vanadium-containing raw material and an alkali compound for oxidation to form a water-soluble vanadate; purifying the vanadate followed by vanadium precipitation to produce an intermediate CaV.sub.2O.sub.6 with high purity; dissolving CaV.sub.2O.sub.6 in a molten-salt medium together with other raw materials to form a uniform reaction system; and introducing a reducing agent to the system followed by separation, washing and drying to produce vanadium or vanadium alloy powder having a particle size of 50-800 nm and a purity of 99.0 wt % or more. The method can continuously process vanadium-containing raw materials to prepare vanadium or vanadium alloy powder.