IR absorption enhancement for physisorbed methanol on Ag island films deposited on the oxidized and H-terminated Si(111) surfaces: Effect of the metal surface morphology

T. Wadayama, O. Suzuki, K. Takeuchi, H. Seki, T. Tanabe, Y. Suzuki, A. Hatta

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35 Citations (Scopus)

Abstract

Infrared absorption measurements using a multiple internal reflection geometry are reported for condensed methanol at 90 K on Ag island films deposited on the oxidized and hydrogen-terminated surfaces of Si(111). The attenuated total reflection (ATR) spectra obtained as a function of methanol exposure (up to 14 L) show that a 1-nm mass thickness of Ag island film on the oxidized Si(111) surface yields an absorption intensity 2-3 times larger than the intensity in the absence of Ag on the oxidized surface. Deposition of the same thickness of Ag on the hydrogen-terminated Si(111) surface results in approximately twice the enhancement. The different magnitudes of the enhancement are discussed based on SEM micrographs for Ag island films formed on the oxidized and H-terminated Si(111) surfaces.

Original languageEnglish
Pages (from-to)77-80
Number of pages4
JournalApplied Physics A: Materials Science and Processing
Volume69
Issue number1
DOIs
Publication statusPublished - 1999 Jul 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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