Résumé
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.
langue originale | Anglais |
---|---|
Pages (de - à) | 203-207 |
Nombre de pages | 5 |
journal | Surface Science |
Volume | 502 |
Etat de la publication | Publié - 2002 |