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RHEED investigation of lattice deformations of α-Al2O3 supported Pd particles

  • K. Mašek
  • V. Matolín
Conference paper

Abstract

Pd particles were grown on (0001) and (2–1–10) surfaces of α-alumina single crystals by means of molecular beam epitaxy. Particles exhibited (11.1) epitaxy preferentially. The orientational relationship, as well as the precise values of lattice parameter, were determined from RHEED measurements. The Pd crystallographic lattice was found to be deformed via an important contraction of the lattice parameter in the direction perpendicular to the interface plane. This deformation was size-dependent, which made this study interesting from the point of view of size effect study in heterogeneous catalysis.

PACS

61.14.Rq Other electron diffraction and scattering techniques for structure analysis 61.43.+w Clusters, nanoparticles, and uanocrystalline materials 68.55.-a Thin film structure and morphology 

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Copyright information

© Springer-Verlag Italia 1999

Authors and Affiliations

  • K. Mašek
    • 1
  • V. Matolín
    • 1
  1. 1.Department of Electronics and Vacuum PhysicsCharles UniversityPrague 8Czech Republic

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