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

Xing Wei, Seok Cheol Hong, A. I. Lvovsky, Hermann Held, Y. R. Shen

Research output: Contribution to journalArticlepeer-review

121 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)3349-3354
Number of pages6
JournalJournal of Physical Chemistry B
Volume104
Issue number14
Publication statusPublished - 2000 Apr 13
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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