Surface self-diffusion on Pt(001) by an atomic exchange mechanism
- 25 June 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 64 (26), 3143-3146
- https://doi.org/10.1103/physrevlett.64.3143
Abstract
Field-ion microscopy has been used to map the surface sites visited by an individual Pt adatom migrating at 175 K on the Pt(001) plane and to determine its activation energy for surface diffusion. Atomic displacements are found to occur only in the [100] or [010] directions. A surprisingly low activation energy of 0.47 eV is measured. These results are consistent with a model in which the diffusion occurs by an adatom-substrate exchange mechanism. This mechanism is predicted theoretically for self-diffusion on Al(001).Keywords
This publication has 12 references indexed in Scilit:
- Lattice relaxation near isolated adsorbatesPhysical Review Letters, 1989
- Structure of platinum adatom clusters on Pt(100): Experimental observations and embedded-atom-method calculationsPhysical Review B, 1989
- Direct observation of atomic structures in the surface reconstruction of Ir and Pt (001), (110), and (131) surfacesPhysical Review B, 1987
- Surface DiffusionAnnual Review of Physical Chemistry, 1980
- Single atom self-diffusion on nickel surfacesSurface Science, 1980
- Surface Diffusion by an Atomic Exchange MechanismPhysical Review Letters, 1980
- Behavior and properties of single atoms on metal surfacesCritical Reviews in Solid State and Materials Sciences, 1978
- Direct observation of surface diffusion and atomic interactions on metal surfacesSurface Science, 1978
- Diffusion of single adatoms of platinum, iridium and gold on platinum surfacesSurface Science, 1978
- Surface self-diffusion on an fcc crystal: An atomic viewThe Journal of Chemical Physics, 1974