Surface Diffusion of Large Ag Clusters on Ag(100)
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Scanning tunneling microscopy has shown that large, two-dimensional Ag clusters undergo observable diffusion on Ag(100). The variation of the diffusion coefficient with cluster size in the range studied, 100 to 540 atoms per cluster, indicates that two-dimensional evaporation-condensation is the main mechanism of cluster diffusion. The experimental data consistently show evidence for a backward-correlation in the cluster motion. The meaning and origin of this correlation is discussed.
This article is from Evolution of Thin-Film and Surface Structure and Morphology: Proceedings of the MRS 1994 Fall Meeting 355 (1995): pp. 15—20, doi:10.1557/PROC-355-15