Infrared reflection absorption spectroscopic study for CO adsorption on molecular beam epitaxially grown Fe films on Cu(1 1 1)

T. Tanabe, R. Buckmaster, T. Ishibashi, T. Wadayama, A. Hatta

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Adsorption of CO at 90 K on molecular beam epitaxially grown Fe films on Cu(1 1 1) has been investigated using IR reflection absorption spectroscopy (IRRAS). Reflection high energy electron diffraction images reveal Fe films up to 4 ML (monolayer) thickness have an fcc(1 1 1) structure and a mixture of fcc(1 1 1) and bcc(1 1 0) structures for 4-8 ML thick films. A bcc(1 1 0) structure dominates the films beyond 8 ML in thickness. The C-O stretching frequency at saturation coverages observed by IRRAS represents these structural differences clearly. For 1-4 ML thick fee Fe films C-O stretch is located at 2000 cm-1 and the 6-8 ML thick films yield two C-O stretch bands at 2000 and 2032 cm-1, the latter of which is dominant for films more than 10 ML thick.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalSurface Science
Volume472
Issue number1-2
DOIs
Publication statusPublished - 2001 Jan 20
Externally publishedYes

Keywords

  • Carbon monoxide
  • Chemisorption
  • Copper
  • Infrared absorption spectroscopy
  • Iron
  • Molecular beam epitaxy
  • Reflection high-energy electron diffraction (RHEED)
  • Surface structure, morphology, roughness, and topography

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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