Methods of nanostructure formation and shape selection
AssigneeUniversity of Washington
InventorsYounan Xia, Yugang Sun
Life of this patent
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Abstract
Methods for forming nanostructures of various shapes are disclosed. Nanocubes, nanowires, nanopyramids and multiply twinned particles of silver may by formed by combining a solution of silver nitrate in ethylene glycol with a solution of poly(vinyl pyrrolidone) in ethylene glycol. Hollow nanostructures may be formed by reacting a solution of solid nanostructures comprising one of a first metal and a first metal alloy with a metal salt that can be reduced by the first metal or first metal alloy. Nanostructures comprising a core with at least one nanoshell may be formed by plating a nanostructure and reacting the plating with a metal salt.
Claims14
A method of manufacturing silver nanopyramids having a desired shape and size, the method comprising:
- obtaining a solution of silver nitrate in ethylene glycol,
- obtaining a solution of poly(vinyl pyrrolidone) in ethylene glycol;
- selecting reaction conditions to yield a silver nanopyramid having a desired shape and size, wherein the reaction conditions comprise a silver nitrate concentration, a poly(vinyl pyrrolidone) concentration, a reaction temperature and a growth time;
- and
- combining the solution of silver nitrate in ethylene glycol and the solution of poly(vinyl pyrrolidone) in ethylene glycol together, and allowing a reaction to occur at the reaction temperature over the growth time.
A method of manufacturing silver nanocubes comprising:
- preparing a solution of silver nitrate in ethylene glycol, wherein the concentration of silver nitrate ranges from 0.1 mol/dm3 to 0.3 mol/dm3;
- preparing a solution of poly(vinyl pyrrolidone) in ethylene glycol, wherein the concentration and amount of poly(vinyl pyrrolidone) solution is sufficient to provide a ratio of poly(vinyl pyrrolidone) to silver nitrate ranging from about 1.5 to 3;
- and
- combining the silver nitrate solution and poly(vinyl pyrrolidone) solution and allowing the mixture to react for a time ranging from 10 minutes to 60 minutes.
A method of manufacturing silver nanowires having a desired shape and size, the method comprising:
- obtaining a solution of silver nitrate in a solvent;
- obtaining a solution of poly(vinyl pyrrolidone) in a solvent;
- selecting at least one reaction condition to yield a silver nanowire having a desired shape and size;
- combining the solution of silver nitrate in solvent and the solution of poly(vinyl pyrrolidone) in solvent together;
- and
- allowing a reaction to occur at a reaction temperature over a growth time.
A method of manufacturing silver nanowires the method comprising:
- obtaining a solution of silver nitrate in solvent,
- obtaining a solution of poly(vinyl pyrrolidone) in solvent;
- selecting reaction conditions to yield a silver nanowire, wherein the reaction conditions comprise a silver nitrate concentration, a poly(vinyl pyrrolidone) concentration, a reaction temperature and a growth time;
- and
- combining the solution of silver nitrate in solvent and the solution of poly(vinyl pyrrolidone) in solvent together, and allowing a reaction to occur at the reaction temperature over the growth time to synthesize silver nanowires.
Dependencies are inferred from the claim text.