Orientation relationship between metallic thin films and quasicrystalline substrates.

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2004-01-01
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Fournée, V.
Ross, A.
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Lograsso, Thomas
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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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We present experimental results on the structure of Ag thin films grown on high-symmetry surfaces of both quasicrystals and approximants. For coverages above ten monolayers, Ag form fcc nanocrystals with (111) plane parallel to the surface plane. Depending on the substrate surface symmetry, the Ag nanocrystals exist in one, two or five different orientations, rotated by a multiple of 2π/30. The orientation relationship between crystalline films and substrates appears to be determined by the following principles: high atomic density rows of the adsorbate are aligned along high atomic density rows of the substrate.

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V. Fournée, A. R. Rossa, T. A. Lograsso and P. A. Thiel (2003). Orientation relationship between metallic thin films and quasicrystalline substrates.. MRS Proceedings, 805, LL8.3 doi:10.1557/PROC-805-LL8.3.

http://dx.doi.org/10.1557/PROC-805-LL8.3

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Sat Jan 01 00:00:00 UTC 2005