Zeitschrift für Physik D Atoms, Molecules and Clusters

, Volume 36, Issue 1, pp 73–83

HREM studies of the structure and the oxidation process of copper clusters created by inert gas aggregation

Authors

  • J. Urban
    • Abt. Anorganische ChemieFritz-Haber-Institut der Max-Planck-Gesellschaft
  • H. Sack-Kongehl
    • Abt. Anorganische ChemieFritz-Haber-Institut der Max-Planck-Gesellschaft
  • K. Weiss
    • Abt. Anorganische ChemieFritz-Haber-Institut der Max-Planck-Gesellschaft
Clusters

DOI: 10.1007/BF01437424

Cite this article as:
Urban, J., Sack-Kongehl, H. & Weiss, K. Z Phys D - Atoms, Molecules and Clusters (1996) 36: 73. doi:10.1007/BF01437424

Abstract

Structure and reactivity with oxigen of Cu clusters in the size range of 4.5±2.5 nm created by the inert gas aggregation technique were studied by HREM. The pure Cu clusters investigated under clean conditions show the structures of MTP's with a small lattice dilatation of the (111) plane of 1.25%. For icosahedral and decahedral particles this dilatation corresponds to a splitting of the nearest neighbour distance showing two different values, i.e. dilatation of 2.2% and contraction of 2.8% for the two edges of the deformed tetrahedral subunits, respectively. Oxidation at room temperature and air pressure of 1 bar only begins after a few minutes of exposure to air, after having undergone creation of probably non-stoichiometric intermediate states in the cuprite Cu2O structure with the bulk values of the bond lengths.

PACS

36.40.+d61.16.B9

Copyright information

© Springer-Verlag 1996