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Article Dans Une Revue Journal of Physical Chemistry C Année : 2012

Discerning the Origins of the Amplitude Fluctuations in Dynamic Raman Nanospectroscopy

Résumé

We introduce a novel experimental and analytical method for discerning rare surface-enhanced Raman scattering (SERS) events observable at the nanoscale. We show that the kinetics of the Raman activity recorded on an isolated nanostructure is punctuated by intense and rare events of large amplitude and spectral variations. The fluctuations of thousands of SERS spectra were analyzed statistically in terms of power density functions, and the occurrence of the rare events was quantified by a wavenumber statistics. Our analysis enables one to extract valuable and unique spectroscopic signature of Raman variations usually hidden in time-average or space-average measurements. We illustrate our approach using molecular surface dynamics of gold adatoms on nanoparticles.
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Dates et versions

hal-00789839 , version 1 (18-02-2013)

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Citer

Jeremie Margueritat, Alexandre Bouhelier, Laurent Markey, Gérard Colas Des Francs, Alain Dereux, et al.. Discerning the Origins of the Amplitude Fluctuations in Dynamic Raman Nanospectroscopy. Journal of Physical Chemistry C, 2012, 116, pp.26919--26923. ⟨10.1021/jp309365d⟩. ⟨hal-00789839⟩
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