| Texto completo | |
| Autor(es): |
Sant'Ana, A. C.
[1]
;
Rocha, T. C. R.
[2, 3]
;
Santos, P. S.
[1]
;
Zanchet, D.
[3]
;
Temperini, M. L. A.
[1, 3]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Inst Quim, Sao Paulo - Brazil
[2] Univ Estadual Campinas, IFGW, Campinas, SP - Brazil
[3] Lab Nacl Luz Sincroton, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Raman Spectroscopy; v. 40, n. 2, p. 183-190, FEB 2009. |
| Citações Web of Science: | 46 |
| Resumo | |
Surface-enhanced Raman scattering (SERS) spectra of 2-amino-5-nitropyridine (ANP) adsorbed on colloidal silver triangular nanoplates were obtained using samples with different mean sizes and surface plasmon frequencies. The relative SERS enhancement factor for each sample was determined by the analysis of the normalized SERS excitation profiles of ANP vibrational modes for nanoplates in suspension, without aggregation. The SERS profiles are blue-shifted in relation to the localized surface plasmon peak. The detailed characterization of both morphology and concentration of the samples in addition to a rigorous normalization of the SERS spectra allowed a quantitative correlation between the SERS profiles and the mean size of the nanoplates. This correlation indicated the existence of an optimum size of the nanoplates for maximum Raman enhancement. Copyright (C) 2008 John Wiley \& Sons, Ltd. (AU) | |
| Processo FAPESP: | 01/09497-8 - Espectroscopia, caracterização e modelagem de microambientes |
| Beneficiário: | Marcia Laudelina Arruda Temperini |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |