Visualization of Active Sites for Plasmon-Induced Electron Transfer Reactions Using Photoelectrochemical Polymerization of Pyrrole

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• 作者：Hiro Minamimoto ; Takahiro Toda ; Ryo Futashima ; Xiaowei Li ; Kentaro Suzuki ; Satoshi Yasuda ; Kei Murakoshi
• 刊名：Journal of Physical Chemistry C
• 出版年：2016
• 出版时间：July 28, 2016
• 年：2016
• 卷：120
• 期：29
• 页码：16051-16058
• 全文大小：497K
• 年卷期：0
• ISSN：1932-7455

文摘

Spatially selective deposition of conductive polymer was observed at the Au nanostructures supported on TiO₂ electrodes via plasmon-induced photopolymerization of pyrrole monomers. The reactions were triggered by the excitation of localized surface plasmon resonance under near-infrared light illumination to the plasmon-active Au nanostructures. The morphological characteristics of the deposited polypyrrole prove the localization of the reaction-active sites in the plasmon-induced oxidation-reaction system. In addition, the estimation of reaction characteristics provides information on the spatial distribution and the electrochemical potential of the holes to contribute to the reaction. The unique polymer-growing process observed in the present system provides information on the mechanism of plasmon-induced oxidation reaction occurring at the active sites.