Evaluation of surface vs bulk contributions in sum-frequency vibrational spectroscopy using reflection and transmission geometries

Citation
X. Wei et al., Evaluation of surface vs bulk contributions in sum-frequency vibrational spectroscopy using reflection and transmission geometries, J PHYS CH B, 104(14), 2000, pp. 3349-3354
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF PHYSICAL CHEMISTRY B
ISSN journal
1520-6106 → ACNP
Volume
104
Issue
14
Year of publication
2000
Pages
3349 - 3354
Database
ISI
SICI code
1520-6106(20000413)104:14<3349:EOSVBC>2.0.ZU;2-U
Abstract
An experiment was designed to measure sum-frequency generation (SFG) spectr a in both reflection and transmission. The result from an octadecyltrichlor osilane monolayer on a substrate reveals that while the resonant spectra in the two geometries both originate from the surface monolayer, the bulk sub strate has a significant contribution to the nonresonant background in the transmitted spectra. Study of a polyethylene film also shows that the bulk contribution to the SFG spectra is only significant for the transmission ge ometry, exhibiting a resonant mode not observable in the reflected spectra.