期刊
SMALL
卷 14, 期 17, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201703615
关键词
alloys; bulk metals; cavitation; nanoparticles; ultrasonication
类别
资金
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering
- U.S. Department of Energy's National Nuclear Security Administration [DE-NA-0003525]
A method for creating nanoparticles directly from bulk metal by applying ultrasound to the surface in the presence of a two-part surfactant system is presented. Implosive collapse of cavitation bubbles near the bulk metal surface generates powerful microjets, leading to material ejection. This liberated material is captured and stabilized by a surfactant bilayer in the form of nanoparticles. The method is characterized in detail using gold, but is also demonstrated on other metals and alloys, and is generally applicable. It is shown that nanoparticles can be produced regardless of the bulk metal form factor, and the method is extended to an environmentally important problem, the reclamation of gold from an electronic waste stream.
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