Luo, M.F., MacLaren, D.A. , Shuttleworth, I.G. and Allison, W. (2003) Preferential sub-surface occupation of atomic hydrogen on Cu(1 1 1). Chemical Physics Letters, 381(5-6), pp. 654-659. (doi: 10.1016/j.cplett.2003.09.154)
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Publisher's URL: http://dx.doi.org/10.1016/j.cplett.2003.09.154
Abstract
We demonstrate sub-surface absorption of hydrogen on Cu(1 1 1) to be energetically favoured, even in the limit of zero coverage and without surface reconstruction. Helium atom scattering measurements indicate desorption of hydrogen from the surface at a lower temperature, than that required to remove all absorbed hydrogen. The stablest bonding site, which is invisible to the helium beam, is therefore not a surface site. Our experimental observations of the behaviour of Cu(1 1 1) differ from previous calculations and contrast with other systems, where population of subsurface sites generally occurs only after population of surface states, or after significant surface reconstruction.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | MacLaren, Professor Donald |
Authors: | Luo, M.F., MacLaren, D.A., Shuttleworth, I.G., and Allison, W. |
Subjects: | Q Science > QC Physics |
College/School: | College of Science and Engineering > School of Physics and Astronomy University Centres > Glasgow Materials Research Initiative |
Journal Name: | Chemical Physics Letters |
Publisher: | Elsevier BV |
ISSN: | 0009-2614 |
ISSN (Online): | 1873-4448 |
Published Online: | 04 November 2003 |
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