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High-coverage structures of carbon monoxide adsorbed on Pt(111) studied by high-pressure scanning tunneling microscopy

Longwitz, Sarah R.; Schnadt, Joachim LU ; Vestergaard, Ebbe Kruse; Vang, Ronnie T.; Lægsgaard, Erik; Stensgaard, Ivan; Brune, Harald and Besenbacher, Flemming (2004) In Journal of Physical Chemistry B 108(38). p.14497-14502
Abstract

High-pressure scanning tunneling microscopy was used to study the room-temperature adsorption of CO on a Pt(111) single-crystal surface in equilibrium with the gas phase. The coverage was found to vary continuously, and over the entire range from 10-6-760 Torr pressure-dependent moiré patterns were observed, characteristic of a hexagonal or nearly hexagonal CO overlayer. Two different pressure ranges can be distinguished: below 10-2 Torr, the moiré lattice vector is oriented along a 30° high-symmetry direction of the substrate, corresponding to a pressure-dependent rotation of the CO overlayer with respect to the (1 × 1) Pt surface lattice, while above 10-2 Torr, the CO layer angle is independent of the... (More)

High-pressure scanning tunneling microscopy was used to study the room-temperature adsorption of CO on a Pt(111) single-crystal surface in equilibrium with the gas phase. The coverage was found to vary continuously, and over the entire range from 10-6-760 Torr pressure-dependent moiré patterns were observed, characteristic of a hexagonal or nearly hexagonal CO overlayer. Two different pressure ranges can be distinguished: below 10-2 Torr, the moiré lattice vector is oriented along a 30° high-symmetry direction of the substrate, corresponding to a pressure-dependent rotation of the CO overlayer with respect to the (1 × 1) Pt surface lattice, while above 10-2 Torr, the CO layer angle is independent of the pressure. This behavior is analyzed in terms of the interplay of the repulsive CO-CO interaction potential and the substrate potential.

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author
publishing date
type
Contribution to journal
publication status
published
in
Journal of Physical Chemistry B
volume
108
issue
38
pages
6 pages
publisher
The American Chemical Society
external identifiers
  • scopus:5044234464
ISSN
1520-6106
DOI
10.1021/jp0492218
language
English
LU publication?
no
id
1289d4e2-a60e-4ec9-85cd-b5d1af1ba653
date added to LUP
2018-08-07 22:08:34
date last changed
2018-11-25 04:24:12
@article{1289d4e2-a60e-4ec9-85cd-b5d1af1ba653,
  abstract     = {<p>High-pressure scanning tunneling microscopy was used to study the room-temperature adsorption of CO on a Pt(111) single-crystal surface in equilibrium with the gas phase. The coverage was found to vary continuously, and over the entire range from 10<sup>-6</sup>-760 Torr pressure-dependent moiré patterns were observed, characteristic of a hexagonal or nearly hexagonal CO overlayer. Two different pressure ranges can be distinguished: below 10<sup>-2</sup> Torr, the moiré lattice vector is oriented along a 30° high-symmetry direction of the substrate, corresponding to a pressure-dependent rotation of the CO overlayer with respect to the (1 × 1) Pt surface lattice, while above 10<sup>-2</sup> Torr, the CO layer angle is independent of the pressure. This behavior is analyzed in terms of the interplay of the repulsive CO-CO interaction potential and the substrate potential.</p>},
  author       = {Longwitz, Sarah R. and Schnadt, Joachim and Vestergaard, Ebbe Kruse and Vang, Ronnie T. and Lægsgaard, Erik and Stensgaard, Ivan and Brune, Harald and Besenbacher, Flemming},
  issn         = {1520-6106},
  language     = {eng},
  month        = {09},
  number       = {38},
  pages        = {14497--14502},
  publisher    = {The American Chemical Society},
  series       = {Journal of Physical Chemistry B},
  title        = {High-coverage structures of carbon monoxide adsorbed on Pt(111) studied by high-pressure scanning tunneling microscopy},
  url          = {http://dx.doi.org/10.1021/jp0492218},
  volume       = {108},
  year         = {2004},
}