Abstract
The nucleation density (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 +2=0.65±0.03 eV, with pair-binding energy =0.25±0.05, diffusion energy =0.15±0.10, and adsorption energy =2.2±0.1 eV. Values for Ag/Ag(111) are calculated in effective-medium theory, giving =2.23, =0.28, =0.12, and +2=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