Adsorption geometry of CN on Cu(111) and Cu(111)/O
UNSPECIFIED. (2004) Adsorption geometry of CN on Cu(111) and Cu(111)/O. Surface Science, 563 (1-3). pp. 159-168. ISSN 0039-6028Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/j.susc.2004.06.167
The adsorption geometry of CN on Cu(1 1 1), both with and without predosing with oxygen, has been investigated using N K-edge near-edge X-ray absorption fine structure (NEXAFS) and C 1s and N 1s scanned-energy mode photoelectron diffraction (PhD). The NEXAFS shows clearly that adsorbed onto clean Cu(1 1 1) the C-N axis is closely parallel to the surface, but in the presence of coadsorbed oxygen the average orientation has the axis tilted by 25degrees away from the surface; this confirms a much earlier report of an oxygen-induced reorientation of CN on this surface based on vibrational spectroscopy. The PhD data show very weak modulations which are rather insensitive to the emission geometry, clearly implying a high degree of disorder or a local adsorption site well-removed from any position of high point group symmetry. The best-fit structure corresponds to the CN lying slightly displaced from the three-fold coordinated hollow sites but with the C and N atoms having single Cu atom nearest neighbours at distances of 1.98 +/- 0.05 and 2.00 +/- 0.05 Angstrom respectively. (C) 2004 Elsevier B.V. All rights reserved.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry
Q Science > QC Physics
|Journal or Publication Title:||Surface Science|
|Publisher:||ELSEVIER SCIENCE BV|
|Date:||10 August 2004|
|Number of Pages:||10|
|Page Range:||pp. 159-168|
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