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INFLUENCE OF SURFACE MODIFICATION ON THE ADSORPTION DYNAMICS OFO2ONCu{100}

Author

Listed:
  • P. JUNELL

    (Surface Science Laboratory, Tampere University of Technology, PO Box 692, FIN-33101, Tampere, Finland)

  • M. AHONEN

    (Surface Science Laboratory, Tampere University of Technology, PO Box 692, FIN-33101, Tampere, Finland)

  • M. HIRSIMÄKI

    (Surface Science Laboratory, Tampere University of Technology, PO Box 692, FIN-33101, Tampere, Finland)

  • M. VALDEN

    (Surface Science Laboratory, Tampere University of Technology, PO Box 692, FIN-33101, Tampere, Finland)

Abstract

Translational energy(ET)dependence of oxygen(O2)adsorption on clean and modifiedCu{100}has been studied by molecular beam surface scattering (MBSS) experiments. The role of surface defects on the adsorption dynamics has been investigated by blocking the defects with Ag and oxygen atoms, and by increasing the defect density withAr+-ion bombardment. At lowETthe adsorption ofO2is shown to be indirect and facilitated either by a dynamical steering mechanism or a precursor state. At highETthe defects have only marginal effect on the adsorption. Additionally, the modification of the surface electronic structure by preadsorbed oxygen is shown to have a pronounced effect on the adsorption dynamics, whereas the electronic structure modification by preadsorbedAgis shown to be relatively inefficient in changing the reactivity ofCu{100}towardsO2adsorption.

Suggested Citation

  • P. Junell & M. Ahonen & M. Hirsimäki & M. Valden, 2004. "INFLUENCE OF SURFACE MODIFICATION ON THE ADSORPTION DYNAMICS OFO2ONCu{100}," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 11(04n05), pages 457-461.
    • Handle: RePEc:wsi:srlxxx:v:11:y:2004:i:04n05:n:s0218625x0400627x
    DOI: 10.1142/S0218625X0400627X
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