Photoreduction of Silver Salts Using Au Nanoparticles to Form a Core-Shell-Type Nanostructure: Insight into the Reaction Mechanism
Photoreduction of Silver Salts Using Au Nanoparticles to Form a Core-Shell-Type Nanostructure: Insight into the Reaction Mechanism
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利用金纳米粒子光还原银盐形成核壳型纳米结构：洞察反应机制
DOI：
10.1007/s11468-014-9700-9
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发表时间：
2014-03
期刊：
影响因子：
3
通讯作者：
Fang, Yan
中科院分区：
文献类型：
--
作者：
Zhang, Lisheng;Lahiri, Abhishek;Wang, Peijie;Fang, Yan
In this paper, we highlight the formation of Ag/Au core-shell nanoparticles at room temperature by using a low-power laser. We have investigated the plasmon-induced reduction of Ag+ions on bare Au nanoparticles synthesized by laser ablation technique, and citrate-capped Au nanoparticles synthesized by chemical method. It is demonstrated that citrate plays an important role for the reduction of silver ions. The citrate gets oxidized by the ‘hot’ holes produced due to the surface plasmon resonance (SPR) of the Au nanoparticles which then reduces the Ag+ions to Ag. The importance of excitation laser wavelength is also demonstrated to facilitate the reduction process.
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