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

被引：0
|
作者：
K. Mašek
V. Matolín
机构：
[1] Department of Electronics and Vacuum Physics,
[2] Charles University,undefined
[3] V Holešovickách 2,undefined
[4] CZ-180 00 Prague 8,undefined
[5] Czech Republic (e-mail: masek@mbox.troja.mff.cuni.cz),undefined
来源：
The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics | 1999年 / 9卷
关键词：
PACS: 61.14.Rq Other electron diffraction and scattering techniques for structure analysis – 61.46.+w Clusters, nanoparticles, and nanocrystalline materials – 68.55.-a Thin film structure and morphology;
D O I：
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中图分类号：
学科分类号：
摘要：
Pd particles were grown on (0001) and (2-1-10) surfaces of α-alumina single crystals by means of molecular beam epitaxy. Particles exhibited (111) 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.
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页码：557 / 560
页数：3
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