Thumbnail
Access Restriction
Open

Author Koh, Seong Jin ♦ Ehrlich, Gert
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ATOMS ♦ CHAINS ♦ DISSOCIATION ENERGY ♦ FLUCTUATIONS ♦ RIPENING
Abstract Ostwald ripening, in which large clusters grow at the expense of smaller ones, is driven by differences in the chemical potentials of these clusters. We demonstrate that ripening can also occur without chemical potential differences between small and large particles, by observing the exchange of single atoms between linear chains of Ir atoms; on a W(110) surface these dissociate at a rate independent of length. Ripening takes place because of the stochastic nature of individual atomic events, and is characterized by large fluctuations in the number of exchanges for a chain to disappear. This mechanism should be generally applicable in the ripening of one-dimensional chains, formed on metals as well as semiconductors, and for which the dissociation energy is insensitive to length.
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 2000-10-15
Publisher Place United States
Journal Physical Review B
Volume Number 62
Issue Number 16


Open content in new tab

   Open content in new tab