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Island decay on the anisotropic Ag(110) surface

Published online by Cambridge University Press:  17 March 2011

Karina Morgenstern ,
Erik Lægsgaard  and
Flemming Besenbacher
Karina Morgenstern
Affiliation:
Institute of Physics and Astronomy and CAMP, University of Aarhus, DK - 8000 Aarhus C., Denmark Institut für Experimentalphysik, FU Berlin, D - 14195 Berlin, Germany
Erik Lægsgaard
Affiliation:
Institute of Physics and Astronomy and CAMP, University of Aarhus, DK - 8000 Aarhus C., Denmark
Flemming Besenbacher
Affiliation:
Institute of Physics and Astronomy and CAMP, University of Aarhus, DK - 8000 Aarhus C., Denmark
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Abstract

We have investigated the decay of two-dimensional islands on the anisotropic Ag(110) surface using variable-temperature scanning tunneling microscopy. Contrary to predictions from traditional Ostwald ripening theory, a quasi-one-dimensional decay mode is observed at low temperatures (175-220 K). A surprisingly sharp transition to the quasi-two-dimensional decay mode is observed around 220 K. This transition is accompanied by a fast equilibration of the island shape. These findings have tentatively been rationalized within a simple model to identify the underlying rate limiting atomistic processes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 648: Symposium P – Growth, Evolution & Properties of Surfaces, Thin Films, and Self Organized Structure , 2000 , P1.5
Copyright
Copyright © Materials Research Society 2001

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