On the Origin of the Efficient Nanoparticle Mediated Electron Transfer across a Self-Assembled Monolayer

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• 作者：Jean-No毛l Chazalviel ; Philippe Allongue
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：February 2, 2011
• 年：2011
• 卷：133
• 期：4
• 页码：762-764
• 全文大小：681K
• 年卷期：v.133,no.4(February 2, 2011)
• ISSN：1520-5126

文摘

Recent advances in bioelectrochemistry came from the elaboration of conducting electrodes modified by an organic layer onto which nanoparticles are adsorbed. Self-assembled monolayers on noble-metal electrodes are known to hinder the electrochemical kinetics of fast-transfer redox systems. Surprisingly, fast kinetics are recovered when metal nanoparticles are deposited on top of the monolayer. We show that this surprising behavior can be fully accounted for when realizing that electron transfer from metal to metal is intrinsically easier than transfer between metal and redox system by many orders of magnitude.