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Single-molecule surface-enhanced Raman scattering of fullerene C60

Authors

  • Zhixun Luo,

    1. Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
    2. Graduate School of the Chinese Academy of Sciences, Beijing 100049, P.R. China
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  • Boon H. Loo,

    1. Department of Chemistry, Towson University, Towson, MD 21252, USA
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  • Aidong Peng,

    1. Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
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  • Ying Ma,

    1. Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
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  • Hongbing Fu,

    1. Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
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  • Jiannian Yao

    Corresponding author
    1. Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
    • Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China.
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Abstract

We achieved single-molecule surface-enhanced Raman scattering (SM-SERS) spectra from ultralow concentrations (10−15 M) of fullerene C60 on uniformly assembled Au nanoparticles. It was found that resonant excitation at 785 nm is a powerful tool to probe SM-SERS in this system. The appearance of additional bands and splitting of some vibrational modes were observed because of the symmetry reduction of the adsorbed molecule and a relaxation in the surface selection rules. Time-evolved spectral fluctuation and ‘hot spot’ dependence in the SM-SERS spectra were demonstrated to result from the single-molecule Raman behavior of the spherical C60 on Au nanoparticles. Copyright © 2010 John Wiley & Sons, Ltd.

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