Back to results
US 10,518,331 B2Granted
Synthesis of uniform anisotropic nanoparticles
AssigneeNorthwestern University
InventorsChad A. Mirkin, Matthew R. Jones, Matthew N. O'Brien
Life of this patent
Estimating the term…
Abstract
Methods of synthesizing various metal nanoparticle structures having high uniformity, using iterative reduction and oxidation conditions, is provided herein.
Claims20
A method of preparing gold circular disk nanoparticle comprising
- (a) admixing gold triangular prisms, a stabilizing agent, and an oxidizing agent in an aqueous solution to form a first intermediate;
- (b) admixing the first intermediate, a gold salt, and a reducing agent, and optionally a base and halide salt, in an aqueous solution to form a second intermediate;
- (c) admixing the second intermediate, a stabilizing agent, and oxidizing agent in an aqueous solution to form the gold circular disk nanoparticle;
- and
- (d) optionally repeating steps (b) and (c) at least once to increase the uniformity of the resulting circular disk nanoparticles;
- wherein the gold circular disk nanoparticles are formed in a yield of at least 70%.
3 more elements
A method of preparing uniform gold spherical nanoparticles comprising
- (a) admixing gold nanorods, a stabilizing agent, and an oxidizing agent in an aqueous solution to form a first intermediate;
- (b) admixing the first intermediate, a gold salt, and a reducing agent, and optionally a base and halide salt, in an aqueous solution to form a second intermediate;
- (c) admixing the second intermediate, a stabilizing agent, and an oxidizing agent in an aqueous solution to form the gold spherical nanoparticles;
- and
- (d) optionally repeating steps (b) and (c) at least once to increase the uniformity of the resulting gold spherical nanoparticles, as measured by a coefficient of variation (CV);
- wherein
- (1) the method is performed in the absence of ethylene glycol, dimethylformamide, diethylene glycol, dimethylsulfoxide, toluene, tetrahydrofuran, hexane, octane, and oleic acid;
- (2) the gold spherical nanoparticles are formed in a yield of at least 90%;
- and
- (3) the gold spherical nanoparticles have a diameter of 1 nm to 99 nm.
7 more elements
Dependencies are inferred from the claim text.