Actions for LEEM Investigation of the Faceting of the Pt Covered W (111) Surface [electronic resource].

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LEEM Investigation of the Faceting of the Pt Covered W (111) Surface [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1999.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
Sandia National Laboratories, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A low energy electron microscope (LEEM) has been used to investigate the faceting of W(111) as induced by Pt. The atomically rough W(111) surface, when fully covered with a monolayer film of Pt and annealed to temperatures higher than ∼ 750 K, experiences a significant morphological restructuring: the initially planar surface undergoes a faceting transition and forms three-sided pyramids with {211} faces. The experiments demonstrate the capability of LEEM for imaging both the fully and partially faceted surface. In addition, we have observed the formation of the facets in real time, when Pt is dosed onto the heated surface. We find that the transition from planar surface, to partially faceted surface, and to fully faceted surface proceeds through the nucleation and growth of spatially separated faceted regions.
Report Numbers
E 1.99:sand99-0126j
sand99-0126j
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Note
Published through SciTech Connect.
01/20/1999.
"sand99-0126j"
"DE00003217"
Surface Science FT
Kellogg, G.L.; Hannon, J.B.; Madey, T.E.; Pelhos, K.
Funding Information
AC04-94AL85000
View MARC record | catkey: 14457201