Brownian Motion of Vacancy Islands on Ag(111)

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Morgenstern, Karina and Rosenfeld, Georg and Poelsema, Bene and Comsa, George (1995) Brownian Motion of Vacancy Islands on Ag(111). Physical Review Letters, 74 (11). pp. 2058-2061. ISSN 0031-9007

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Abstract:The motion of monatomic deep vacancy islands on crystal surfaces is studied both theoretically and experimentally. We develop a new theoretical model which allows us to deduce the microscopic mechanism of mass transport from measuring the diffusion coefficients of the vacancy islands as a function of their size. This model is applied to experimental results obtained with a fast scanning tunneling microscope on Ag(111) at room temperature. The observed scaling is consistent with a mechanism where the microscopic mass transport is dominated by diffusion of adatoms across the vacancy island rather than along the island boundary.
Item Type:Article
Copyright:© 1995 The American Physical Society
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/61220
Official URL:http://dx.doi.org/10.1103/PhysRevLett.74.2058
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Metis ID: 128895