Monodisperse noble metal nanocrystals
First Claim
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1. A method of synthesizing nanocrystals of a noble metal comprising:
- (a) combining, in a single phase non-aqueous solvent system,(i) a noble metal complex, compound, or salt;
(ii) at least one weak ligand selected from a fatty acid, an aliphatic amine, or a mixture thereof, or surfactant for the noble metal complex, compound or salt; and
(iii) at least one reducing agent, to form an admixture thereof;
(b) permitting said nanocrystals to form from the admixture; and
(c) isolating the nanocrystals from the solvent system.
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Abstract
Nanoparticle compositions of noble metals, and methods of making them, are described. The nanoparticle compositions are made by reacting a salt or complex of a noble metal, such as Au, Ag, Cu or Pt, with a weak ligand, and a reducing agent, in a single liquid phase. The noble metal is typically provided as a halide or carboxylate. The ligand is preferably a fatty acid or aliphatic amine. The reducing agent is preferably a borohydride reagent, hydrazine, or a mixture thereof. Nanocrystals in the size range of 1 nm to 20 nm are produced, and can be made in substantially monodisperse form.
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19 Claims
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1. A method of synthesizing nanocrystals of a noble metal comprising:
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(a) combining, in a single phase non-aqueous solvent system, (i) a noble metal complex, compound, or salt; (ii) at least one weak ligand selected from a fatty acid, an aliphatic amine, or a mixture thereof, or surfactant for the noble metal complex, compound or salt; and (iii) at least one reducing agent, to form an admixture thereof; (b) permitting said nanocrystals to form from the admixture; and (c) isolating the nanocrystals from the solvent system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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