Mapping the Energy Distribution of SERRS Hot Spots from Anti-Stokes to Stokes Intensity Ratios
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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| Data(s) |
05/11/2013
05/11/2013
2012
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| Resumo |
The anomalies in the anti-Stokes to Stokes intensity ratios in single-molecule surface-enhanced resonance Raman scattering were investigated. Brilliant green and crystal violet dyes were the molecular probes, and the experiments were carried out on an electrochemically activated Ag surface. The results allowed new insights into the origin of these anomalies and led to a new method to confirm the single-molecule regime in surface-enhanced Raman scattering. Moreover, a methodology to estimate the distribution of resonance energies that contributed to the imbalance in the anti-Stokes to Stokes intensity ratios at the electromagnetic hot spots was proposed. This method allowed the local plasmonic resonance energies on the metallic surface to be spatially mapped. NSERC NSERC FAPESP [FAPESP/CIAM 06/58748-5] FAPESP Department of Foreign Affairs and International Trade Canada (DFAIT) Department of Foreign Affairs and International Trade Canada (DFAIT) CNPq CNPq |
| Identificador |
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, WASHINGTON, v. 134, n. 32, pp. 13492-13500, AUG 15, 2012 0002-7863 http://www.producao.usp.br/handle/BDPI/41750 10.1021/ja305580t |
| Idioma(s) |
eng |
| Publicador |
AMER CHEMICAL SOC WASHINGTON |
| Relação |
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY |
| Direitos |
closedAccess Copyright AMER CHEMICAL SOC |
| Palavras-Chave | #ENHANCED RAMAN-SCATTERING #SILVER NANOPARTICLE ARRAYS #SINGLE-MOLECULE #CRYSTAL-VIOLET #SURFACE #SPECTROSCOPY #ADSORPTION #EXTINCTION #EXCITATION #SPECTRA #CHEMISTRY, MULTIDISCIPLINARY |
| Tipo |
article original article publishedVersion |
