Formation Mechanism of Colloidal Silver Nanoparticles: Analogies and Differences to the Growth of Gold Nanoparticles
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- 作者：J枚rg Polte ; Xenia Tuaev ; Maria Wuithschick ; Anna Fischer ; Andreas F. Thuenemann ; Klaus Rademann ; Ralph Kraehnert ; Franziska Emmerling
- 刊名：ACS Nano
- 出版年：2012
- 出版时间：July 24, 2012
- 年：2012
- 卷：6
- 期：7
- 页码：5791-5802
- 全文大小：591K
- 年卷期：v.6,no.7(July 24, 2012)
- ISSN：1936-086X
文摘
The formation mechanisms of silver nanoparticles using aqueous silver perchlorate solutions as precursors and sodium borohydride as reducing agent were investigated based on time-resolved in situ experiments. This contribution addresses two important issues in colloidal science: (i) differences and analogies between growth processes of different metals such as gold and silver and (ii) the influence of a steric stabilizing agent on the growth process. The results reveal that a growth due to coalescence is a fundamental growth principle if the monomer-supplying chemical reaction is faster than the actual particle formation.