Abstract
The diffusion of platinum adatoms and dimers on Pt(111) has been measured at different temperatures by direct observation in a low-temperature field ion microscope. The activation energy for single atom motion is found to be 0.260±0.003 eV, while for dimers it is 0.37±0.02 eV. Comparison with previous results obtained in STM studies of the density of islands after deposition from the vapor as well as with theoretical estimates are now possible. The former are in excellent agreement, the latter less so, but empirical extrapolation from the neighboring iridium proves useful. Contributions from dimer diffusion to growth at low temperatures can also be assessed, and are found to be minor.
| Original language | English |
|---|---|
| Pages (from-to) | 191-196 |
| Number of pages | 6 |
| Journal | Surface Science |
| Volume | 397 |
| Issue number | 1-3 |
| Publication status | Published - 1998 Feb |
| Externally published | Yes |
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Keywords
- Adatoms
- Clusters
- Diffusion and migration
- Field ion microscopy
- Nucleation
- Platinum
- Single crystal surfaces
- Surface diffusion
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Condensed Matter Physics
- Surfaces and Interfaces
Cite this
Growth and the diffusion of platinum atoms and dimers on Pt(111). / Kyuno, Kentaro; Gölzhäuser, Armin; Ehrlich, Gert.
In: Surface Science, Vol. 397, No. 1-3, 02.1998, p. 191-196.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Growth and the diffusion of platinum atoms and dimers on Pt(111)
AU - Kyuno, Kentaro
AU - Gölzhäuser, Armin
AU - Ehrlich, Gert
PY - 1998/2
Y1 - 1998/2
N2 - The diffusion of platinum adatoms and dimers on Pt(111) has been measured at different temperatures by direct observation in a low-temperature field ion microscope. The activation energy for single atom motion is found to be 0.260±0.003 eV, while for dimers it is 0.37±0.02 eV. Comparison with previous results obtained in STM studies of the density of islands after deposition from the vapor as well as with theoretical estimates are now possible. The former are in excellent agreement, the latter less so, but empirical extrapolation from the neighboring iridium proves useful. Contributions from dimer diffusion to growth at low temperatures can also be assessed, and are found to be minor.
AB - The diffusion of platinum adatoms and dimers on Pt(111) has been measured at different temperatures by direct observation in a low-temperature field ion microscope. The activation energy for single atom motion is found to be 0.260±0.003 eV, while for dimers it is 0.37±0.02 eV. Comparison with previous results obtained in STM studies of the density of islands after deposition from the vapor as well as with theoretical estimates are now possible. The former are in excellent agreement, the latter less so, but empirical extrapolation from the neighboring iridium proves useful. Contributions from dimer diffusion to growth at low temperatures can also be assessed, and are found to be minor.
KW - Adatoms
KW - Clusters
KW - Diffusion and migration
KW - Field ion microscopy
KW - Nucleation
KW - Platinum
KW - Single crystal surfaces
KW - Surface diffusion
UR - http://www.scopus.com/inward/record.url?scp=0031988799&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031988799&partnerID=8YFLogxK
M3 - Article
VL - 397
SP - 191
EP - 196
JO - Surface Science
JF - Surface Science
SN - 0039-6028
IS - 1-3
ER -