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Geometrical and electronic structure of Pd clusters on graphite

Authors :
E. Boschung
Th. Pillo
J. Hayoz
M. Bovet
Giovanni Dietler
Philipp Aebi

Abstract

Pd clusters formed by physical vapor deposition at room temperature (RT) on highly oriented pyrolytic graphite were investigated by a combination of X-ray photoelectron spectroscopy and diffraction, angle-resolved ultraviolet photoelectron spectroscopy, scanning tunneling microscopy and calculations based on the local density functional theory. Different coverages with nominally 3, 5 and 10 A were studied after deposition at RT and after heat treatment at 600°C. Local ordering exhibiting growth with an fcc(1 1 1) orientation is already observed at the lowest coverage, but with no preferred azimuthal orientation in accordance with the substrate itself. However electronic structure features characteristic for a Pd(1 1 1) single crystal appear only after heat treatment.

Details

Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....a4026687fda09e0a46e8bbf80fdcb889