Simultaneous excitation and emission enhancement of fluorescence assisted by double plasmon modes of gold nanorods

Si Yun Liu, Lu Huang, Jia Fang Li*, Chen Wang, Qiang Li, Hong Xing Xu, Hong Lian Guo, Zi Ming Meng, Zhe Shi, Zhi Yuan Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

127 Citations (Scopus)

Abstract

Here we propose a scheme utilizing the double plasmon modes of gold nanorod (GNR) to efficiently enhance the fluorescence of surrounding emitters. The transversal and longitudinal surface plasmon resonance (TSPR and LSPR, respectively) modes of GNR are simultaneously utilized to enhance the excitation and emission efficiency, respectively. To demonstrate the idea, GNRs coated with an Oxazine-725 dye molecule-doped silica shell are employed. For comparison, gold nanospheres with the same shell are also studied, of which the single plasmon resonance mode matches only with the excitation wavelength of Oxazine-725. The experimental results, in agreement with theoretical simulations using the discrete dipole approximation method, successfully demonstrate the efficient excitation and emission enhancement of fluorescence assisted by the double SPRs of GNRs.

Original languageEnglish
Pages (from-to)10636-10642
Number of pages7
JournalJournal of Physical Chemistry C
Volume117
Issue number20
DOIs
Publication statusPublished - 23 May 2013
Externally publishedYes

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