Self-adsorption sites on a close-packed surface: Ir on Ir(111)
Journal Article
·
· Phys. Rev. Lett.; (United States)
The binding sites for adsorption of a single iridium atom on a close-packed iridium (111) plane have been mapped out in the field ion microscope by observing the location of one iridium atom after diffusion over the surface at T/similar to/100 K. Both surface (hcp) and bulk (fcc) sites are found occupied, but the former are favored, with the free energy for adatoms /similar to/370 cal/mol lower on surface sites. This free-energy difference is small compared to the barrier of 6.2 kcal/mol which separates equivalent sites in surface diffusion.
- Research Organization:
- Materials Research Laboratory and Department of Materials Science is 61801 Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
- OSTI ID:
- 6336324
- Journal Information:
- Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 62:19; ISSN PRLTA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ADSORPTION
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DIFFUSION
ELEMENTS
ENERGY
FCC LATTICES
FREE ENERGY
HCP LATTICES
HEXAGONAL LATTICES
ION MICROSCOPY
IRIDIUM
LOW TEMPERATURE
METALS
MICROSCOPY
ORIENTATION
PHYSICAL PROPERTIES
PLATINUM METALS
SORPTION
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
360602* -- Other Materials-- Structure & Phase Studies
ADSORPTION
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DIFFUSION
ELEMENTS
ENERGY
FCC LATTICES
FREE ENERGY
HCP LATTICES
HEXAGONAL LATTICES
ION MICROSCOPY
IRIDIUM
LOW TEMPERATURE
METALS
MICROSCOPY
ORIENTATION
PHYSICAL PROPERTIES
PLATINUM METALS
SORPTION
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS