Metal nanoparticles and method for manufacturing same
View Patent ↗The main object of the present invention is to manufacture, on an industrial scale, metal nanoparticles with excellent dispersion stability, and therefore provides metal nanoparticles containing a metal component, further containing at least one of phosphorus, nitrogen, and oxygen, and the average particle size being from 1 to 100 nm.
1. A method for manufacturing metal nanoparticles by heat treating a starting material containing a metal salt and a fatty acid, in the presence of an amine compound and in an inert gas atmosphere, wherein the amine compound and the starting material containing a metal salt and a fatty acid are solid at the beginning of said heat treatment.
2. The method according to claim 1 , wherein the metal salt is at least one of (1) metal carbonates, (2) fatty acid salts, and (3) metal complexes.
3. The method according to claim 1 , wherein an organic solvent is not used.
4. A method for manufacturing metal nanoparticles by heat-treating in an inert gas atmosphere a metal complex having a phosphine ligand and a carboxylate ligand, wherein the metal complex is a solid at the beginning of said heat treatment.
5. The manufacturing method according to claim 4 , wherein the heat treatment temperature is within a temperature range such that weight loss will be from 1 to 50% when said metal complex is subjected to thermogravimetric analysis.
6. The manufacturing method according to claim 4 , wherein the metal complex has no ligands other than a phosphine ligand and a carboxylate ligand.
7. A method for manufacturing metal nanoparticles which comprises a step of heat-treating a mixture containing (1) phosphine and (2) (i) a metal salt of a fatty acid or (ii) a fatty acid and a metal salt in an inert gas atmosphere, wherein the mixture is a solid at the beginning of said heat treatment.