Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9595008 | Surface Science | 2005 | 10 Pages |
Abstract
The long-range ordered p(2 Ã 2) self-assembled monolayer formed by dosing 2-mercaptobenzoxazole (MBO, C7H5NOS) on the Cu(1 0 0) surface at room temperature has been structurally characterised by means of normal incidence X-ray standing wavefield absorption (NIXSW) at both (2 0 0) and (1 1 1) reflections. The results show that the S atom, through which the adsorbed molecular thiolate species bonds to the surface, has an interlayer spacing of 1.33 ± 0.05 Ã
relative to the extended bulk scatterer planes (2Â 0Â 0) parallel to the surface and occupies the four-fold coordinated hollow site, with no evidence of major reconstruction. These results are entirely consistent with previous findings for a number of thiolates formed on (1Â 0Â 0) noble metal surfaces. The role of the head-group to surface potential corrugation and intermolecular interactions in determining the adsorption site and ordering of this aromatic molecular adsorbate is discussed.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
F. Allegretti, D.P. Woodruff, V.R. Dhanak, C. Mariani, F. Bussolotti, S. D'Addato,