Energies controlling nucleation and growth processes: The case of Ag/W(110)

G. W. Jones, J. M. Marcano, Jens Kehlet Nørskov, J. A. Venables

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The nucleation density Nx(T) of Ag islands on the 2-monolayer-thick silver intermediate layer on W(110) is measured by UHV scanning electron microscopy and compared with kinetic nucleation equations. This yields a well-determined value of Ed+2Eb=0.65±0.03 eV, with pair-binding energy Eb=0.25±0.05, diffusion energy Ed=0.15±0.10, and adsorption energy Ea=2.2±0.1 eV. Values for Ag/Ag(111) are calculated in effective-medium theory, giving Ea=2.23, Eb=0.28, Ed=0.12, and Ed+2Eb=0.68 eV. Observations on vicinal and impure surfaces are reported, and implications for defect binding energies discussed.
Original languageEnglish
JournalPhysical Review Letters
Issue number26
Pages (from-to)3317-3320
Publication statusPublished - 1990

Bibliographical note

Copyright (1990) by the American Physical Society.

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