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Type: Artigo de periódico
Title: Size-dependent SERS enhancement of colloidal silver nanoplates: the case of 2-amino-5-nitropyridine
Author: Sant'Ana, AC
Rocha, TCR
Santos, PS
Zanchet, D
Temperini, MLA
Abstract: 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.
Subject: SERS
triangular nanoplates
silver nanoprisms
surface plasmon
Country: Inglaterra
Editor: John Wiley & Sons Ltd
Rights: fechado
Identifier DOI: 10.1002/jrs.2103
Date Issue: 2009
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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