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Author Kyuno, K. ♦ Ehrlich, G.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ MASS TRANSFER ♦ PLATINUM ♦ ION MICROSCOPES ♦ TEMPERATURE DEPENDENCE ♦ CRYSTAL GROWTH ♦ DIFFUSION BARRIERS ♦ ARRHENIUS EQUATION ♦ ATOMIC CLUSTERS
Abstract The escape of platinum from Pt(111) islands has been examined in the field ion microscope to obtain a direct view of atomic events. No effective barrier to the escape of platinum clusters larger than dimers is found at step edges, but incorporation of individual adatoms is nevertheless more effective at low temperatures. From the temperature dependence of the rate of atom disappearance from Pt(111) islands, the additional step-edge barrier is found as 0.06{plus_minus}0.01 eV , quite small compared with the diffusion barrier of 0.26thinspthinspeV, and in sharp contrast with deductions from growth experiments. {copyright} {ital 1998} {ital The American Physical Society }
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 1998-12-01
Publisher Place United States
Journal Physical Review Letters
Volume Number 81
Issue Number 25


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