Discrete reductive charging of immobilized gold nanoclusters in aqueous media

Discrete reductive charging of immobilized gold nanoclusters in aqueous media
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水介质中固定金纳米团簇的离散还原充电

DOI:
10.1016/j.elecom.2011.03.031
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发表时间:
2011-06
影响因子:
5.4
通讯作者:
Su, Bin
Su, Bin
中科院分区:
工程技术3区
文献类型:
--
作者:
Li, Wanzhen;Wang, Dan;Su, Bin

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研究了由单层保护的金纳米团簇(MPC)涂覆在电极表面并浸入水介质中组成的多层膜对还原性充电的抑制作用。在使用具有亲脂性阳离子的水溶性电解质时,明确观察到MPC膜的离散还原性充电。阳离子浓度依赖性和电化学石英晶体微天平测试结果表明,膜/溶液界面上的阳离子迁移是紧密伴随的。从这项研究中,它是合理的,在以前的作品中使用的亲脂性阳离子不足占还原充电电流的抑制。
Multilayer films consisting of monolayer-protected gold nanoclusters (MPCs) coated on electrode surfaces and immersed in aqueous media were investigated to elucidate the suppression of the reductive charging. On the use of water-soluble electrolytes featuring a lipophilic cation, discrete reductive charging of MPC films was unambiguously observed. It was proved to be tightly concomitant with the cation transfer at the film/solution interface by the cation concentration dependence and electrochemical quartz crystal microbalance measurements. From this study, it was rationalized that the inadequate lipophilic cations used in previous works accounted for the suppression of reductive charging current.
DOI: 10.1002/chin.200841270
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