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H2O adsorption on Ge(100): An angle-resolved photoelectron spectroscopy study

Författare:
Publiceringsår: 1991
Språk: Engelska
Sidor: 9281-9283
Publikation/Tidskrift/Serie: Physical Review B
Volym: 43
Nummer: 11
Dokumenttyp: Artikel
Förlag: American Physical Society

Sammanfattning

The adsorption of H2O on Ge(100)2×1 was studied with angle-resolved photoelectron spectroscopy. The surface was exposed to H2O at 160 K. The sample was then heated to 300 K where the measurements were performed. The surface band structure was mapped in the [010] direction. We find six bands that we assign to a surface-adsorbate structure. One band with binding energy in the region 4.6–4.9 eV is assigned to the Ge-H bond. Another band dispersing between 5.6 and 5.8 eV is assigned to the Ge-OH bond. The results agree with models where the H2O is adsorbed dissociatively across the Ge-Ge dimers as H and OH on this surface at 300 K. Bands assigned to the H and OH groups disperse in momentum-energy space and we conclude that there is some long-range ordering within the adsorbate layer.

Disputation

Nyckelord

  • Physics and Astronomy

Övriga

Published
Yes
  • Electromagnetic theory
  • ISSN: 1098-0121

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