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Applied Physics A

, Volume 71, Issue 1, pp 19–22 | Cite as

Surface Ostwald ripening of Pd nanoparticles on the MgO (100) surface

  • Á. Imre
  • D.L. Beke
  • E. Gontier-Moya
  • I.A. Szabó
  • E. Gillet
  • 203 Downloads

Abstract.

Morphological changes of Pd nanoparticles on the (100) surface of MgO single crystal were investigated by Auger electron spectroscopy in the temperature range of 873–983 K. The size and distribution of clusters were also examined by means of atomic force microscopy. It was shown that there was practically no decrease of the effective thickness of deposited Pd during heat treatments under 6×10-9 mbar. Assuming that the observed change in the Auger intensities is due to the surface Ostwald ripening the temperature dependence of the surface mass transport diffusion coefficients can be given as Ds=(1.6+8.2-1.34)×10-8exp((-(136±15) kJ mol-1)/(RT))m2 s-1 .

PACS: 82.80.Pv; 61.46.+w; 66.30.-h 

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Copyright information

© Springer-Verlag 2000

Authors and Affiliations

  • Á. Imre
    • 1
  • D.L. Beke
    • 1
  • E. Gontier-Moya
    • 2
  • I.A. Szabó
    • 1
  • E. Gillet
    • 2
  1. 1.Department of Solid State Physics, University of Debrecen, 4010 Debrecen, P.O. Box 2, HungaryHU
  2. 2.Laboratoire SERMEC, B61, Faculté des Sciences et Techniques de St. Jerôme, 13397-Marseille Cedex 20, FranceFR

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