Extraordinary Surface Plasmon Coupled Emission Using Core/Shell Gold Nanorods

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• 作者：Huimin Su ; Yongchun Zhong ; Tian Ming ; Jianfang Wang ; Kam Sing Wong
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：April 26, 2012
• 年：2012
• 卷：116
• 期：16
• 页码：9259-9264
• 全文大小：357K
• 年卷期：v.116,no.16(April 26, 2012)
• ISSN：1932-7455

文摘

Plasmon-coupled fluorescence from Au nanorods with fluorophore-doped silica shells has been studied. Besides the ordinary emission of the fluorophore at 590 nm, an extra emission peak was found on the normally weak fluorescence tail at the surface plasmon resonance (SPR) of the Au nanorods around 750 nm. It provides clear evidence of the plasmonic emission. Our experiment results suggest that the linear absorption coefficient of fluorophores was strongly enhanced around the SPR wavelength and the plasmonic emission at 750 nm was created by the resonance energy transfer from the excited fluorophores to SPRs. The energy transfer rate was estimated to be 5.22 ns^鈥?, and the total quantum yield of the sample was 1.5 times that of the free fluorophore molecules in aqueous solutions. This study supports that strong fluorescence at desired wavelength can be engineered by fluorophore鈥損lasmon coupling.