Title: Excitation wavelength dependent surface enhanced Raman scattering of 4-aminothiophenol on gold nanorings
Authors: Ye, Jian ×
Hutchison, James Andell
Uji-I, Hiroshi
Hofkens, Johan
Lagae, Liesbet
Maes, Guido
Borghs, Gustaaf
Van Dorpe, Pol #
Issue Date: 2012
Publisher: RSC Publishing
Series Title: Nanoscale vol:4 issue:5 pages:1606-1611
Abstract: Detailed understanding of the underlying mechanisms of surface enhanced Raman scattering (SERS) remains challenging for different experimental conditions. We report on an excitation wavelength dependent SERS of 4-aminothiophenol molecules on gold nanorings. SERS and normal Raman spectra, combined with well-characterized surface morphology, optical spectroscopy and electromagnetic (EM) field simulations of gold nanoring substrates indicate that the EM enhancement occurs at all three excitation wavelengths (532, 633 and 785 nm) employed but at short wavelengths (532 and 633 nm) charge transfer (CT) results in additional strong enhancements of particular Raman transitions. These results pave the way to further understanding the origin of the SERS mechanism.
ISSN: 2040-3364
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
Quantum Chemistry and Physical Chemistry Section
× corresponding author
# (joint) last author

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