RHEED investigation of lattice deformations of α-Al2O3 supported Pd particles
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.
PACS61.14.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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- 1.K. 11,13,,éek, V. Matolfn: Vacuum 50, 151 (1998)Google Scholar
- 2.I. Stara, V. Gonzalez, I. Junwirthova, K. 1\ila.ek, V. Matan: Surf. Rev. Lett. 5, 397 (1998)Google Scholar
- 4.V. MatoLín, B. Peuchot: Thin Solid Films 259, 65 (1995),5. C.R. Henry, C. Chapon, J.M. Penisson, G. Nihoul: Z. Phys. D 12, 145 (1989)Google Scholar