Reference : IR-visible sum-frequency vibrational spectroscopy of Biphenyl-3 methylene thiol monol...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
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 mailto [Université de Liège - ULiège > Département de physique > Biophotonique >]
Mani, A. A. [ > > ]
Caudano, Y. [ > > ]
Lemaire, J.-J. [ > > ]
Thiry, P. A. [ > > ]
Peremans, A. [ > > ]
Surface Science
Elsevier Science
Yes (verified by ORBi)
The Netherlands
[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.
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