Article (Scientific journals)
IR-visible sum-frequency vibrational spectroscopy of Biphenyl-3 methylene thiol monolayer on gold and silver: effect of the visible wavelength on the SFG spectrum
Humbert, Christophe; Dreesen, Laurent; Mani, A. A. et al.
2002In Surface Science, 502-503, p. 203-207
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Abstract :
[en] We measured IR-visible sum-frequency generation spectra of CH3-(C6H4)2-(CH2)3-S-H (Biphenyl-3) self-assembled monolayers on a silver and a gold substrate. For the latter substrate, we observed different interference patterns between the resonant signal of the CH vibration and the non-resonant contribution of the substrate as a function of the visible beam wavelength. The non-linear response of the gold substrate is enhanced around 480 nm corresponding to the s-d interband transition. Such effect is not observed for the silver substrate the interband transition of which is located out of the investigated visible spectral range of 450-700 nm.
Disciplines :
Physics
Author, co-author :
Humbert, Christophe
Dreesen, Laurent ;  Université de Liège - ULiège > Département de physique > Biophotonique
Mani, A. A.
Caudano, Y.
Lemaire, J.-J.
Thiry, P. A.
Peremans, A.
Language :
English
Title :
IR-visible sum-frequency vibrational spectroscopy of Biphenyl-3 methylene thiol monolayer on gold and silver: effect of the visible wavelength on the SFG spectrum
Publication date :
2002
Journal title :
Surface Science
ISSN :
0039-6028
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
502-503
Pages :
203-207
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 26 October 2009

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