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Iron Clusters And Oxygen-Chemisorbed Iron Clusters

Author

Listed:
  • LAI-SHENG WANG

    (Department of Physics, Washington State University, Richland, WA 99352, USA;
    Environmental Molecular Science Laboratory, Pacific Northwest Laboratory, MS K2–14, Richland, WA 99352, USA)

  • JIAWEN FAN

    (Environmental Molecular Science Laboratory, Pacific Northwest Laboratory, MS K2–14, Richland, WA 99352, USA)

  • LIANG LOU

    (Rice Quantum Institute and Departments of Chemistry and Physics, Rice University, Houston, TX 77251, USA)

Abstract

The photoelectron spectroscopy of size-selected${\rm{Fe}}_n^-$(n=3–24)clusters and oxygen-chemisorbed clustersFenO−(n=1–16), has been studied at 3.49-eV photon energy with a magnetic-bottle time-of-flight photoelectron spectrometer. While the spectra of the pure iron clusters show rather sharp features in the whole size range, those of the oxygen-chemisorbed species are considerably different, with extensive sharp structures observed for n only up to 6. The electron affinities (EAs) of both the bare and chemisorbed clusters exhibit strong size variations. However, the first oxygenation of the iron clusters induces a systematic lowering of EA in the size rangen=9–15. Towards a complete molecular picture of these interesting clusters, density-functional calculations are being performed to determine the equilibrium cluster structures, oxygen chemisorption sites, and their electronic structures. The equilibrium structures obtained forFenOwithn=2–6are reported.

Suggested Citation

  • Lai-Sheng Wang & Jiawen Fan & Liang Lou, 1996. "Iron Clusters And Oxygen-Chemisorbed Iron Clusters," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 3(01), pages 695-699.
    • Handle: RePEc:wsi:srlxxx:v:03:y:1996:i:01:n:s0218625x9600125x
    DOI: 10.1142/S0218625X9600125X
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