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

被引：133

作者：

Wei, X

Hong, SC

Lvovsky, AI

Held, H

Shen, YR ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2000年 / 104卷 / 14期

关键词：

D O I：

10.1021/jp9933929

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An experiment was designed to measure sum-frequency generation (SFG) spectra in both reflection and transmission. The result from an octadecyltrichlorosilane monolayer on a substrate reveals that while the resonant spectra in the two geometries both originate from the surface monolayer, the bulk substrate 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 geometry, exhibiting a resonant mode not observable in the reflected spectra.

引用

页码：3349 / 3354

页数：6

共 16 条

[1] Surface chemistry-mechanical property relationship of low density polyethylene: an IR plus visible sum frequency generation spectroscopy and atomic force microscopy study [J].