Step edge diffusion and the structure of nanometer-size Ir islands on the Ir(111) surface

Tsu-Yi Fu, Yi Ren Tzeng, Tien T. Tsong

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We report an FIM study of the structure of nanometer-size Ir islands on the Ir(111) surface. In this experiment, the number of atoms in an island is carefully controlled by field evaporation and vapor deposition. When this number can be fitted to a hexagonal atomic arrangement, the stable structure is found to be a perfect hexagon. In other cases, an addition of one ledge atom can reverse the symmetry of a small island or change its shape. We also compare diffusion of adatoms on the Ir(311) and (331) surfaces to that of ledge-atoms along the A- and B-type steps of the (111) layer, and the relative binding energies of a ledge atom at these steps.

Original languageEnglish
JournalSurface Science
Volume366
Issue number2
DOIs
Publication statusPublished - 1996 Oct 20

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ledges
Atoms
atoms
Vapor deposition
Adatoms
hexagons
Binding energy
adatoms
Evaporation
binding energy
evaporation
vapor deposition
symmetry
Experiments

Keywords

  • Iridium
  • Single crystal surfaces
  • Stepped single crystal surfaces
  • Surface diffusion
  • Surface structure, morphology, roughness, and topography

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Step edge diffusion and the structure of nanometer-size Ir islands on the Ir(111) surface. / Fu, Tsu-Yi; Tzeng, Yi Ren; Tsong, Tien T.

In: Surface Science, Vol. 366, No. 2, 20.10.1996.

Research output: Contribution to journalArticle

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