Active Molecular Plasmonics: Controlling Plasmon Resonances with Molecular Switches

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• 作者：Yue Bing Zheng ; Ying-Wei Yang ; Lasse Jensen ; Lei Fang ; Bala Krishna Juluri ; Amar H. Flood ; Paul S. Weiss ; J. Fraser Stoddart ; Tony Jun Huang
• 刊名：Nano Letters
• 出版年：2009
• 出版时间：February 11, 2009
• 年：2009
• 卷：9
• 期：2
• 页码：819-825
• 全文大小：297K
• 年卷期：v.9,no.2(February 11, 2009)
• ISSN：1530-6992

文摘

A gold nanodisk array, coated with bistable, redox-controllable [2]rotaxane molecules, when exposed to chemical oxidants and reductants, undergoes switching of its plasmonic properties reversibly. By contrast, (i) bare gold nanodisks and (ii) disks coated with a redox-active, but mechanically inert, control compound do not display surface-plasmon-based switching. Along with calculations based on time-dependent density functional theory, these experimental observations suggest that the nanoscale movements within surface-bound “molecular machines” can be used as the active components in plasmonic devices.