Title: Morphology and electronic properties of thermally stable TiOx nanoclusters on Au(111)
Authors: Lauwaet, Koen ×
Schouteden, Koen
Janssens, Ewald
Van Haesendonck, Chris
Lievens, Peter #
Issue Date: Apr-2011
Publisher: Published by the American Physical Society through the American Institute of Physics
Series Title: Physical Review B, Condensed Matter and Materials Physics vol:83 issue:15 pages:-
Article number: 155433
Abstract: TiOx clusters on atomically flat Au(111) films have been investigated by means of scanning tunneling microscopy and scanning tunneling spectroscopy. We present measurements of both the morphology and the electronic properties of these clusters. First, pure Ti clusters are produced in the gas phase and are deposited onto a clean Au(111) surface under controlled ultrahigh vacuum conditions. Next, the clusters are oxidized. Then, scanning tunneling microscopy measurements are performed before and after annealing up to high temperatures (970 K), indicating a high thermal stability of the deposited clusters. Scanning tunneling spectroscopy reveals an n-type semiconductorlike gap in the TiOx cluster density of states. Local influence of the clusters on the electronic surface state of the Au(111) substrate is observed, which is relevant for catalytic cycles where certain steps of the cycles take place at the metal-oxide interface.
ISSN: 1098-0121
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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