Issue 5, 2012
From the journal:

Nanoscale

Excitation wavelength dependent surface enhanced Raman scattering of 4-aminothiophenol on gold nanorings

Jian Ye,*ab   James Andell Hutchison,b   Hiroshi Uji-i,b   Johan Hofkens,b   Liesbet Lagae,a   Guido Maes,b   Gustaaf Borghsa  and  Pol Van Dorpea  

* Corresponding authors

a imec vzw, Kapeldreef 75, Leuven, Belgium
E-mail: Jian.Ye@imec.be
Fax: +32 1628 1097
Tel: +32 1628 8795

b Chemistry Department, Katholieke Universiteit Leuven, Leuven, Belgium

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.

Graphical abstract: Excitation wavelength dependent surface enhanced Raman scattering of 4-aminothiophenol on gold nanorings

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Article information

DOI
https://doi.org/10.1039/C2NR11805J
Article type
Paper
Submitted
20 Nov 2011
Accepted
20 Dec 2011
First published
04 Jan 2012

Nanoscale, 2012,4, 1606-1611

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Excitation wavelength dependent surface enhanced Raman scattering of 4-aminothiophenol on gold nanorings

J. Ye, J. A. Hutchison, H. Uji-i, J. Hofkens, L. Lagae, G. Maes, G. Borghs and P. Van Dorpe, Nanoscale, 2012, 4, 1606 DOI: 10.1039/C2NR11805J

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