LEEM Investigation of the Faceting of the Pt Covered W (111) Surface

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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 {approximately} 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 ... continued below

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Hannon, J.B.; Kellogg, G.L.; Madey, T.E. & Pelhos, K. January 20, 1999.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Laboratories, Albuquerque, NM, and Livermore, CA
    Place of Publication: Albuquerque, New Mexico

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Description

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 {approximately} 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.

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  • Journal Name: Surface Science

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  • Other: DE00003217
  • Report No.: SAND99-0126J
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 3217
  • Archival Resource Key: ark:/67531/metadc688041

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 20, 1999

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Nov. 29, 2016, 6:25 p.m.

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Hannon, J.B.; Kellogg, G.L.; Madey, T.E. & Pelhos, K. LEEM Investigation of the Faceting of the Pt Covered W (111) Surface, article, January 20, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc688041/: accessed December 12, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.