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Single‐molecule surface‐enhanced Raman scattering of fullerene C 60
Author(s) -
Luo Zhixun,
Loo Boon H.,
Peng Aidong,
Ma Ying,
Fu Hongbing,
Yao Jiannian
Publication year - 2011
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2694
Subject(s) - raman scattering , raman spectroscopy , fullerene , molecule , excitation , nanoparticle , spectral line , adsorption , molecular physics , relaxation (psychology) , analytical chemistry (journal) , chemistry , materials science , molecular vibration , nanotechnology , optics , physics , psychology , social psychology , organic chemistry , quantum mechanics , astronomy , chromatography
We achieved single‐molecule surface‐enhanced Raman scattering (SM‐SERS) spectra from ultralow concentrations (10 −15 M) of fullerene C 60 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 C 60 on Au nanoparticles. Copyright © 2010 John Wiley & Sons, Ltd.