AN INVESTIGATION OF OXYGEN ADSORPTION ONα-Cu0.82Al0.18(100)USING LOW ENERGY ION SCATTERING

L. Zhu (), E. Zur Muhlen, D. J. O’connor and B. V. King
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L. Zhu: Department of Physics, University of Newcastle, N.S.W. 2308, Australia
E. Zur Muhlen: Department of Physics, University of Newcastle, N.S.W. 2308, Australia;
D. J. O’connor: Department of Physics, University of Newcastle, N.S.W. 2308, Australia
B. V. King: Department of Physics, University of Newcastle, N.S.W. 2308, Australia

Surface Review and Letters (SRL), 1996, vol. 03, issue 02, 1241-1245

Abstract: The adsorption of oxygen onα-Cu0.82Al0.18(100)has been investigated using low energy ion scattering. It was found that initially oxygen adsorbed on Al sites and then it adsorbed on Cu sites before all Al sites were occupied at room temperature. Al segregation induced by oxygen adsorption was found at oxygen exposure >10 L. Upon heating the sample to 300°C, oxygen that adsorbed previously on the Cu sites 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° C, an Al oxide layer was formed at oxygen exposure 3500 L.

Date: 1996
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DOI: 10.1142/S0218625X96002242

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