High-coverage structures of carbon monoxide adsorbed on Pt(111) studied by high-pressure scanning tunneling microscopy
(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
- Longwitz, Sarah R. ; Schnadt, Joachim LU ; Vestergaard, Ebbe Kruse ; Vang, Ronnie T. ; Lægsgaard, Erik ; Stensgaard, Ivan ; Brune, Harald and Besenbacher, Flemming
- publishing date
- 2004-09-23
- 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 (ACS)
- 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
- 2022-04-10 00:58:43
@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 (ACS)}}, 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}}, doi = {{10.1021/jp0492218}}, volume = {{108}}, year = {{2004}}, }