期刊
APPLIED SURFACE SCIENCE
卷 161, 期 1-2, 页码 276-278出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0169-4332(00)00304-4
关键词
Au particles; silica; dissolution; optical absorption
Nanoscale Au particles dispersed in pores in mesoporous silica were prepared by the sol-gel technique, followed by thermal reduction in hydrogen. In contrast to bulk gold metal, An nanoparticles as so-called microelectrodes can be dissolved in hydrochloric acid (HCl), as measured by optical absorption. We attribute this dissolution phenomenon to the high chemical activity of nano-sized particles. (C) 2000 Elsevier Science B.V. All rights reserved.
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