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High-Coverage Structures of Carbon Monoxide Adsorbed on Pt(111) Studied by High-Pressure Scanning Tunneling Microscopy †
| Content Provider | Semantic Scholar |
|---|---|
| Author | Longwitz, Sarah R. Schnadt, Joachim Vestergaard, Ebbe Kruse Vang, Ronnie T. Lægsgaard, Erik Stensgaard, Ivan Brune, Harald Besenbacher, Flemming |
| Copyright Year | 2004 |
| 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 moire patterns were observed, characteristic of a hexagonal or nearly hexagonal CO overlayer. Two different pressure ranges can be distinguished: below 10-2 Torr, the moire 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. |
| Starting Page | 14497 |
| Ending Page | 14502 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.1021/jp0492218 |
| Volume Number | 108 |
| Alternate Webpage(s) | https://infoscience.epfl.ch/record/135815/files/2004_Longwitz_JPC.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |