Method of creating a Pd-covered single-atom sharp W pyramidal tip: Mechanism and energetics of its formation

Tsu-Yi Fu, Lung Chieh Cheng, C. H. Nien, Tien T. Tsong

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Abstract

Single-atom sharp pyramidal W tips, wrapped in a Pd overlayer, having atom-perfect wedges can be routinely and repeatedly created using a surface-science technique. This single-atom tip is thermally stable up to 1000 K because of the exceptionally large surface-energy anisotropy of the Pd covered W(111) surface. We conclude from atom-by-atom analysis that the W tip is covered with only one physical monolayer of Pd. We also investigate the mechanism and energetics of the atomic processes involved in its formation.

Original languageEnglish
Article number113401
Pages (from-to)1134011-1134014
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume64
Issue number11
Publication statusPublished - 2001 Sep 15

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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