Preparation of uniform nanoparticles of ultra-high purity metal oxides, mixed metal oxides, metals, and metal alloys
First Claim
1. A composition comprising nanoparticles having an average particle size, wherein the average particle size is between about 1 nm and about 100 nm, a size distribution, wherein the size distribution is within about 1% to about 15% of the average particle size, and a substantially pre-determined stoichiometry.
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Accused Products
Abstract
In preferred embodiments, metal nanoparticles, mixed-metal (alloy) nanoparticles, metal oxide nanoparticles and mixed-metal oxide nanoparticles are provided. According to embodiments, the nanoparticles may possess narrow size distributions and high purities. In certain preferred embodiments, methods of preparing metal nanoparticles, mixed-metal nanoparticles, metal oxide nanoparticles and mixed-metal nanoparticles are provided. These methods may provide tight control of particle size, size distribution, and oxidation state. Other preferred embodiments relate to a precursor material that may be used to form nanoparticles. In addition, products prepared from such nanoparticles are disclosed.
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Citations
20 Claims
- 1. A composition comprising nanoparticles having an average particle size, wherein the average particle size is between about 1 nm and about 100 nm, a size distribution, wherein the size distribution is within about 1% to about 15% of the average particle size, and a substantially pre-determined stoichiometry.
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8. A method of forming nanoparticles comprising:
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providing a metal salt;
providing a base;
mixing the metal salt and the base to form a precursor material; and
heating the precursor material to a pre-determined temperature, at a pre-determined rate, in a pre-determined atmosphere, and for a pre-determined length of time, wherein the nanoparticles have an average particle size, wherein the average particle size is between about 1 nm and about 100 nm, a size distribution, wherein the size distribution is within about 1% to about 15% of the average particle size, and a substantially pre-determined stoichiometry. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 17, 18, 19)
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16. A precursor material comprising:
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a metal hydroxide; and
a salt compound, wherein the metal hydroxide and the salt compound are formed, at least in part, from mixing a metal salt and a base, and wherein the precursor material can be heated to a pre-determined temperature, at a pre-determined rate, in a pre-determined atmosphere, and for a pre-determined length of time to form nanoparticles having an average particle size, wherein the average particle size is between about 1 nm and about 100 nm, a size distribution, wherein the size distribution is within about 1% and about 15% of the average particle size, and a substantially pre-determined stoichiometry.
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20. A precursor material comprising a complex mixture comprising a metal hydroxide and a salt compound, wherein the precursor material can be heated to a pre-determined temperature, in a pre-determined atmosphere, and for a pre-determined length of time to form nanoparticles having an average particle size, wherein the average particle size is between about 1 nm and about 100 nm, a size distribution, wherein the size distribution is within about 1% and about 15% of the average particle size, and a substantially pre-determined stoichiometry.
Specification