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ADSORPTION OF C60ON Li-COVERED Ni(110) SURFACES

Author

Listed:
  • V. SALTAS

    (Department of Physics, University of Ioannina, PO Box 1186, GR-451 10, Ioannina, Greece)

  • C. A. PAPAGEORGOPOULOS

    (Department of Physics, University of Ioannina, PO Box 1186, GR-451 10, Ioannina, Greece)

Abstract

In this paper the adsorption of C60on Li-covered Ni(110) surfaces is investigated by means of Auger electron spectroscopy, low-energy electron diffraction and work function measurements, in ultrahigh vacuum. Deposition of C60on the 1 × 2 Li-induced Ni(110) surface at 650 K causes the formation of islands with a 4 × 2 structure, where the C60molecules adsorb along neighboring troughs of the substrate. At higher C60coverages, the Li-induced 1 × 2 reconstruction of the Ni(110) surface is lifted and a 9 × 3 structure is formed, which finally ends in a semihexagonal structure, as in the case of C60adsorption on clean Ni(110) surfaces. AES and LEED measurements suggest that charge is transferred from Li to the C60molecules, which in a rough approximation was estimated to be around one electron per C60molecule. The above estimated charge transfer to the C60molecules is substantially smaller than that we have calculated when Li is adsorbed on C60-covered Ni(110) surfaces. Apparently, the order of Li and C60deposition is very important for the charge transfer and the deposition of Li on C60-covered surfaces provides a substantially greater amount of charge to the C60molecules.

Suggested Citation

  • V. Saltas & C. A. Papageorgopoulos, 2003. "ADSORPTION OF C60ON Li-COVERED Ni(110) SURFACES," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 10(01), pages 73-79.
    • Handle: RePEc:wsi:srlxxx:v:10:y:2003:i:01:n:s0218625x03004676
    DOI: 10.1142/S0218625X03004676
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    Keywords

    Auger electron spectroscopy; low energy electron diffraction; WF measurements; adsorption; C60; lithium; nickel;
    All these keywords.

    JEL classification:

    • C60 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - General

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