Process for preparing nanoparticles

摘要

A process for producing nanoparticles comprises the steps of preparing silver seeds in the presence of a water soluble polyanionic polymer and growing the silver seeds to form nanoparticles. The polyanionic polymer may be poly(sodium styrenesulphonate).

主权项

1. A process for producing nanoparticles comprising the steps of:
preparing silver seeds by combining aqueous solutions consisting essentially of trisodium citrate, sodium borohydride, and a water soluble polyanionic polymer selected from the group consisting of: a derivative of an inorganic salt of poly(styrene sulphonate); a copolymer of poly(sodium styrene sulphonate-co-maleic acid); a derivative of poly(anethole sulphonate); a derivative of poly(vinyl sulphate); or a derivative of poly(vinyl sulphonate); and subsequently adding aqueous silver nitrate; and growing the silver seeds to form nanoparticles, the growing of the silver seeds taking place at room temperature using water as a solvent, greater than about 95% of the nanoparticles thus produced being nanoprisms.