Carbon monoxide adsorption on 4 monolayer thick fcc-Fe/Cu(1 0 0): Infrared reflection absorption and low energy electron diffraction studies

T. Wadayama, K. Kubo, T. Yamashita, T. Tanabe, A. Hatta

研究成果: Article査読

5 被引用数 (Scopus)

抄録

Adsorption behavior of carbon monoxide (CO) on 4 monolayer (ML) thick fcc-Fe films grown on Cu(1 0 0) has been investigated with IR reflection absorption spectroscopy (IRRAS) and low energy electron diffraction (LEED). The as-grown film gives a 5 × 1 LEED pattern which remains unchanged during CO exposure at 90 K. Simultaneous IRRAS measurements show that the band due to CO adsorbed on the on-top site dominates the spectra at saturation coverage. In contrast CO exposure at room temperature leads to change in the LEED pattern from 5 × 1 to diffuse c(2 × 2) accompanied by preferential adsorption of CO on the bridge site of the film surface. These results suggest that room temperature CO exposure gives rise to a change in the reconstructed surface of the as-grown film and c(2 × 2) overlayer of CO adsorbed on the bridge site, while CO adsorption takes place on the on-top site of the 5 × 1 reconstructed surface with no long-range ordered overlayer at 90 K.

本文言語English
ページ(範囲)254-258
ページ数5
ジャーナルApplied Surface Science
199
1-4
DOI
出版ステータスPublished - 2002 10 30

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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