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Structural properties and site specific interactions of Pt with the graphene/Ru(0001) moiré overlayer

J. Chem. Phys. 131, 164701 (2009); doi:10.1063/1.3246166

Published 23 October 2009

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Kerstin Donner and Peter Jakob
Fachbereich Physik und Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, D-35032 Marburg, Germany
The coherence of graphene layers on Ru(0001) over extended distances has been employed to identify fcc and hcp regions of the associated moiré superstructure. These findings can be used as a straightforward method to discriminate between fcc and hcp hollow sites of Ru(0001). Our approach thereby makes use of the “magnifying lens” characteristics of the graphene/Ru(0001) overlayer and its coherence across several monatomic steps of the substrate. We demonstrate that the individual regions of the graphene/Ru(0001) overlayer exhibit pronounced variations in interaction strengths with deposited metal atoms. Specifically, Pt clusters have been grown at 140–180 K and they are found to organize in a well-ordered periodic array defined by the moiré superlattice. Their preferred location within the graphene/Ru(0001) moiré unit cell is identified to be the fcc region. ©2009 American Institute of Physics
History: Received 12 August 2009; accepted 21 September 2009; published 23 October 2009
Permalink: http://link.aip.org/link/?JCPSA6/131/164701/1
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KEYWORDS and PACS

Keywords
PACS
  • 68.65.Ac
    Multilayers (structure and nonelectronic properties)
  • 61.46.Bc
    Structure of clusters (nanoscale materials)
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
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