Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5368954 | Applied Surface Science | 2009 | 4 Pages |
Abstract
The initial stages of cluster nucleation for Pd or Ir adatoms on a W (1Â 1Â 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 (1Â 1Â 0) to fcc (1Â 1Â 1). Factors affecting the structural transformation include coverage of atoms or atom chains, temperature of heat treatments and boundary of the substrate terrace.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
T.Y. Fu, Y.H. Wang, T.T. Tsong,