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

Larsson, Christer LU and Flodström, Anders (1991) In Physical Review B (Condensed Matter and Materials Physics) 43(11). p.9281-9283
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
43
issue
11
pages
9281 - 9283
publisher
American Physical Society
external identifiers
  • scopus:0000107318
ISSN
1098-0121
DOI
10.1103/PhysRevB.43.9281
language
English
LU publication?
no
id
78b4c0a5-80ae-4758-97b6-8f0d9ca85afd (old id 1056620)
alternative location
http://link.aps.org/abstract/PRB/v43/p9281
date added to LUP
2008-04-16 14:42:18
date last changed
2017-01-01 06:36:54
@article{78b4c0a5-80ae-4758-97b6-8f0d9ca85afd,
  abstract     = {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.},
  author       = {Larsson, Christer and Flodström, Anders},
  issn         = {1098-0121},
  language     = {eng},
  number       = {11},
  pages        = {9281--9283},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {H2O adsorption on Ge(100): An angle-resolved photoelectron spectroscopy study},
  url          = {http://dx.doi.org/10.1103/PhysRevB.43.9281},
  volume       = {43},
  year         = {1991},
}