Transformation of cluster structure at initial stage

T. Y. Fu, Y. H. Wang, T. T. Tsong

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The initial stages of cluster nucleation for Pd or Ir adatoms on a W (1 1 0) surface and in the vicinity of surface steps are directly imaged by a field ion microscope (FIM). Three types of structures are observed. One is a one-dimensional linear chain, which is parallel to the nearest neighbor-stacking directions of the substrate. Another is a two-dimensional compact island, which is a pseudomorphic structure like the substrate. The other is a three-dimensional cluster, which shows a structural transition from bcc (1 1 0) to fcc (1 1 1). Factors affecting the structural transformation include coverage of atoms or atom chains, temperature of heat treatments and boundary of the substrate terrace.

Original languageEnglish
Pages (from-to)1128-1131
Number of pages4
JournalApplied Surface Science
Volume256
Issue number4
DOIs
Publication statusPublished - 2009 Nov 30

Keywords

  • Field ion microscopy
  • Nucleation
  • Structural transformation
  • Surface thermodynamics

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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