AN INVESTIGATION OF OXYGEN-ADSORPTION ON ALPHA-CU0.82AL0.18(100) USING LOW-ENERGY ION-SCATTERING

Authors
ZHU L ZURMUHLEN E OCONNOR DJ KING BV
Citation
L. Zhu et al., AN INVESTIGATION OF OXYGEN-ADSORPTION ON ALPHA-CU0.82AL0.18(100) USING LOW-ENERGY ION-SCATTERING, Surface review and letters, 3(2), 1996, pp. 1241-1245
Citations number
14
Categorie Soggetti
Physics, Condensed Matter","Physics, Atomic, Molecular & Chemical","Material Science
Journal title
Surface review and letters → ACNP
ISSN journal
0218625X
Volume
3
Issue
2
Year of publication
1996
Pages
1241 - 1245
Database
ISI
SICI code
0218-625X(1996)3:2<1241:AIOOOA>2.0.ZU;2-U
Abstract
The adsorption of oxygen on alpha-Cu0.82Al0.18(100) has been investiga ted using low energy ion scattering. It was found that initially oxyge n adsorbed on Al sites and then it adsorbed on Cu sites before all Al sites were occupied at room temperature. Al segregation induced by oxy gen adsorption was found at oxygen exposure > 10 L. Upon heating the s ample to 300 degrees C, oxygen that adsorbed previously on the Cu site s bonded to thermally segregated Al atoms and kept them on the surface . Experimental results suggest that Al oxide islands were formed upon heating. At the sample temperature of 300 degrees C an Al oxide layer was formed at oxygen exposure 3500 L.