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EVOLUTION OF THE ELECTRONIC AND GEOMETRIC STRUCTURES OF SIZE-SELECTED Pt AND Pd CLUSTERS DEPOSITED ON Ag(110) OBSERVED BY PHOTOEMISSION

Author

Listed:
  • H.-V. ROY

    (Institut de Physique Expérimentale, Université de Lausanne, CH-1015 Lausanne, Switzerland)

  • F. PATTHEY

    (Institut de Physique Expérimentale, Université de Lausanne, CH-1015 Lausanne, Switzerland)

  • P. FAYET

    (Institut de Physique Expérimentale, Université de Lausanne, CH-1015 Lausanne, Switzerland)

  • W.-D. SCHNEIDER

    (Institut de Physique Expérimentale, Université de Lausanne, CH-1015 Lausanne, Switzerland)

  • B. DELLEY

    (Paul-Scherrer-Institut. Badenstrasse 569, CH-8048 Zürich, Switzerland)

Abstract

Mass-selectedPtnandPdn(n=1–15)clusters, generated by ion bombardment, are deposited at room temperature in submonolayer quantities on Ag(110) single-crystal surface and characterized by electron spectroscopy (XPS, UPS). Different sites, reflected in the Pt-5d and Pd-4d binding energies, are observed as a function of the substrate temperature, indicating clearly the surface-subsurface atom exchange processes. The monodispersed clusters indicate individual discrete electronic structure features of the Pt-5d and Pd-4d emission. For the monomers virtual bound-state formation as in dilute (3%) PtAg and PdAg alloys is observed. With increasing cluster size, firstly, the increasing splitting between the bonding-like and antibonding-like d-states reflects the increase in cohesive energy due to molecular interaction, and secondly, the shift of the center of gravity of the d-emission towards the Fermi energy indicates the trend to transition-metal formation.

Suggested Citation

  • H.-V. Roy & F. Patthey & P. Fayet & W.-D. Schneider & B. Delley, 1996. "EVOLUTION OF THE ELECTRONIC AND GEOMETRIC STRUCTURES OF SIZE-SELECTED Pt AND Pd CLUSTERS DEPOSITED ON Ag(110) OBSERVED BY PHOTOEMISSION," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 3(01), pages 943-947.
    • Handle: RePEc:wsi:srlxxx:v:03:y:1996:i:01:n:s0218625x96001698
    DOI: 10.1142/S0218625X96001698
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