6533b85efe1ef96bd12c09a8
RESEARCH PRODUCT
Discerning the Origins of the Amplitude Fluctuations in Dynamic Raman Nanospectroscopy
Johan GrandJérémie MargueritatAlain DereuxStéphanie Lau-truongAlexandre BouhelierJean AubardGérard Colas Des FrancsLaurent MarkeyEric FinotGeorges LéviNordin Félidjsubject
NanostructureSURFACEELECTRODESBENZENETHIOL02 engineering and technology010402 general chemistry01 natural sciencesMolecular physicsSpectral lineRESONANCE FLUORESCENCEsymbols.namesakeOpticsRare eventsBLINKINGWavenumberSCATTERINGPhysical and Theoretical ChemistrySPECTROSCOPYChemistrybusiness.industrySERSObservable021001 nanoscience & nanotechnologySTATISTICS0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsGeneral EnergyAmplitudesymbolsADATOMS0210 nano-technologyRaman spectroscopybusinessRaman scatteringdescription
International audience; 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-12-14 |