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Ripening Mechanisms in Ultrathin Metal Films

Published online by Cambridge University Press:  10 February 2011

Georg Rosenfeld ,
Marcus Essera ,
Karina Morgensternat  and
George Comsa
Georg Rosenfeld
Affiliation:
Faculty of Applied Physics and Centre of Materials Research (CMO), University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, g.rosenfeld@tn.utwente.nl Institut für Physikalische und Theoretische Chemie der Universität Bonn, Wegelerstraße 12, 53115 Bonn, Germany
Marcus Essera
Affiliation:
Institut für Grenzflächenforschung und Vakuumphysik, Forschungszentrum Jülich, 52425 Jülich, Germany
Karina Morgensternat
Affiliation:
Institut für Grenzflächenforschung und Vakuumphysik, Forschungszentrum Jülich, 52425 Jülich, Germany
George Comsa
Affiliation:
Institut für Physikalische und Theoretische Chemie der Universität Bonn, Wegelerstraße 12, 53115 Bonn, Germany
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Abstract

Results of recent experimental model studies on ripening of submonolayer films via Ostwald ripening and dynamic coalescence are described. The experiments have been performed on ensembles of Ag-adatom or vacancy islands on a Ag(111) surface using Scanning Tunneling Microscopy. For Ostwald ripening of adatom islands, deviations from the classical mean-field ripening behaviour are observed which show up as pronounced local correlations in island decay and growth rates. For ripening via dynamic coalescence which is studied for ensembles of vacancy islands, it is found that the increase of the average island size with time in the late-stage regime is correctly described by the classical binary collision model.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 528: Symposia AA – Mechanisms & Principals of Epitaxial Growth in Metallic Systems , 1998 , 111
Copyright
Copyright © Materials Research Society 1998

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