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

G. W. Jones, J. M. Marcano, J. K. Nørskov, and J. A. Venables
Phys. Rev. Lett. 65, 3317 – Published 24 December 1990
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Abstract

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.

  • Received 30 July 1990

DOI:https://doi.org/10.1103/PhysRevLett.65.3317

©1990 American Physical Society

Authors & Affiliations

G. W. Jones, J. M. Marcano, J. K. Nørskov, and J. A. Venables

  • School of Mathematical and Physical Sciences, University of Sussex, Brighton BN1 9QH, England
  • Laboratory of Applied Physics, Technical University of Denmark, Building 307, DK-2800 Lyngby, Denmark

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Issue

Vol. 65, Iss. 26 — 24 December 1990

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