期刊
CHEMISTRY OF MATERIALS
卷 13, 期 5, 页码 1630-1633出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm001240g
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A new method was developed for the homogeneous deposition of silver nanoparticles on colloid silica spheres. The method does not make use of an external electron source, but of a chemical moiety adsorbed on the surface, which can easily get oxidized. The process is mainly performed in two steps: a first step in which the adsorption of Sn2+ ions occurs on the surface of the silica particles and a second step comprising the addition of Ag+ ions, which are reduced and simultaneously adsorbed on the surface, while Sn2+ oxidizes to Sn4+ The whole process can be repeated to obtain a denser coating on the surface.
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