Quantitative determination of hydrogen adsorption site on the Pt(111)-(1 x1) surface by low energy ion channeling

Citation
Km. Lui et al., Quantitative determination of hydrogen adsorption site on the Pt(111)-(1 x1) surface by low energy ion channeling, APPL PHYS L, 75(4), 1999, pp. 587-589
Citations number
11
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
0003-6951 → ACNP
Volume
75
Issue
4
Year of publication
1999
Pages
587 - 589
Database
ISI
SICI code
0003-6951(19990726)75:4<587:QDOHAS>2.0.ZU;2-F
Abstract
Ion channeling using low keV energies is introduced as a sensitive probe fo r determining the adsorption site of hydrogen on surfaces. The technique is shown to be capable of quantitatively probing the positions of light eleme nts on heavy substrates with analysis by simple geometrical constructs. Qua ntitative analysis of the Pt(111)-(1x1)-H surface using 5 keV Ne+ ions show s that the hydrogen atoms preferentially populate the fcc site with a heigh t of 0.9 +/- 0.1 Angstrom above the first-layer Pt atoms and a correspondin g Pt-H bond length of 1.9 +/- 0.1 Angstrom. (C) 1999 American Institute of Physics. [S0003-6951(99)01030-X].