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Methyl on Cu(111) - structural determination including influence of co-adsorbed iodine
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UNSPECIFIED (2002) Methyl on Cu(111) - structural determination including influence of co-adsorbed iodine. Surface Science, 512 (3). pp. 173-184. ISSN 0039-6028.
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Abstract
The adsorption geometry of the methyl species on Cu(111) with and without coadsorbed iodine has been determined using scanned energy mode photoelectron diffraction. Under all circumstances the three-fold-coordinated hollow sites are occupied. At saturation coverage of pure methyl species only the 'fcc' site, directly above a third layer Cu atom is occupied, whereas at half saturation coverage similar to70% of the methyl species occupy these fcc hollows and similar to30% occupy the 'hcp' sites above second layer Cu atoms. Best agreement between theory and experiment corresponded to a methyl group adsorbed with C-3v symmetry, but the possibility that the species was tilted on the surface could not be excluded. The height of the C above the surface in a pure methyl layer was 1.66 +/- 0.02 Angstrom, but was reduced to 1.62 +/- 0.02 Angstrom in the presence of co-adsorbed iodine, suggesting that iodine may increase the strength of adsorption. Iodine was also found to occupy the fcc hollow sites with a Cu-I bondlength of 2.61 +/- 0.02 k (C) 2002 Elsevier Science B.V. All rights reserved.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry Q Science > QC Physics |
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Journal or Publication Title: | Surface Science | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 0039-6028 | ||||
Official Date: | 1 July 2002 | ||||
Dates: |
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Volume: | 512 | ||||
Number: | 3 | ||||
Number of Pages: | 12 | ||||
Page Range: | pp. 173-184 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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