Surface Diffusion of Large Ag Clusters on Ag(100)

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1995
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Evans, James
Chang, S.-L.
Thiel, Patricia
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Evans, James
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Ames National Laboratory

Ames National Laboratory is a government-owned, contractor-operated national laboratory of the U.S. Department of Energy (DOE), operated by and located on the campus of Iowa State University in Ames, Iowa.

For more than 70 years, the Ames National Laboratory has successfully partnered with Iowa State University, and is unique among the 17 DOE laboratories in that it is physically located on the campus of a major research university. Many of the scientists and administrators at the Laboratory also hold faculty positions at the University and the Laboratory has access to both undergraduate and graduate student talent.

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Abstract

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.

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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

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Sun Jan 01 00:00:00 UTC 1995