US 2010/0148132 A1 · Particulate nanoparticles and nanowires of silver and method for large scale producing the same

Abstract

Disclosed is a method suitable for large-scale producing silver nanostructures including nanoparticles and nanowires with high crystallization and purity in a short period of time. In this method, silver particles with mean diameter less than 200 nm and silver nanowires with length in micrometers are produced through a microwave-assisted wet chemistry method. Tens to hundreds grams of silver nanoparticles and nanowires are obtained in minutes by microwave irradiation treatment to a precursor pre-made by highly concentrated silver salt solution and other additives. These silver nanoparticles and nanowires have good dispersibility and are ideal for forming conductive adhesives.

Claims11

Dependent claims

A particulate powder of silver nanoparticles made according to a method comprising the steps of:

(1) dissolving silver salts and a surfactant into a reducing agent to obtain a transparent solution, wherein concentration of the silver salts and the reducing agent is in the range of 0.05˜0.10 g/ml and the ratio between silver salts and surfactant amount is less than 1;
(2) adding soluble chloride to the solution and stirring it to form a precursor suspension;
(3) transferring the precursor suspension to a commercial microwave oven and processing under microwave irradiation;
and
(4) washing silver-containing slurry products by water or ethanol for several times, re-dispersing said slurry products in ethanol or drying them to get the particular powder of silver nanoparticles.

2 more elements

Dependencies are inferred from the claim text.

Particulate nanoparticles and nanowires of silver and method for large scale producing the same

Life of this patent

Particulate nanoparticles and nanowires of silver and method for large scale producing the same

Life of this patent

Abstract

Claims11