Growth and the diffusion of platinum atoms and dimers on Pt(111)

Kentaro Kyuno; Armin Gölzhäuser; Gert Ehrlich

doi:10.1016/S0039-6028(97)00732-2

Growth and the diffusion of platinum atoms and dimers on Pt(111)

Kentaro Kyuno, Armin Gölzhäuser, Gert Ehrlich

Research output: Contribution to journal › Article › peer-review

84 Citations (Scopus)

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
DOIs	https://doi.org/10.1016/S0039-6028(97)00732-2
Publication status	Published - 1998 Feb
Externally published	Yes

Keywords

Adatoms
Clusters
Diffusion and migration
Field ion microscopy
Nucleation
Platinum
Single crystal surfaces
Surface diffusion

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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title = "Growth and the diffusion of platinum atoms and dimers on Pt(111)",

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.",

keywords = "Adatoms, Clusters, Diffusion and migration, Field ion microscopy, Nucleation, Platinum, Single crystal surfaces, Surface diffusion",

author = "Kentaro Kyuno and Armin G{\"o}lzh{\"a}user and Gert Ehrlich",

note = "Funding Information: These studies were carried out with support from the Department of Energy under Grant DEFG02-96ER-45439. We are indebted to S.-J. Koh for discussions, and to R.T. Gladm and W I. Lawrence for help with equipment and procedures. S C. Wang and G. Bolsvert kmdly provided unpublished data. K.K wishes to acknowledge award of a Postdoctoral Fellowship for Research Abroad from the Japan Society for the Promotion of Science A G.'s work was made possible by a Feodor Lynen Fellowship from the Alexander von Humboldt Society.",

year = "1998",

month = feb,

doi = "10.1016/S0039-6028(97)00732-2",

language = "English",

volume = "397",

pages = "191--196",

journal = "Surface Science",

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T1 - Growth and the diffusion of platinum atoms and dimers on Pt(111)

AU - Kyuno, Kentaro

AU - Gölzhäuser, Armin

AU - Ehrlich, Gert

N1 - Funding Information: These studies were carried out with support from the Department of Energy under Grant DEFG02-96ER-45439. We are indebted to S.-J. Koh for discussions, and to R.T. Gladm and W I. Lawrence for help with equipment and procedures. S C. Wang and G. Bolsvert kmdly provided unpublished data. K.K wishes to acknowledge award of a Postdoctoral Fellowship for Research Abroad from the Japan Society for the Promotion of Science A G.'s work was made possible by a Feodor Lynen Fellowship from the Alexander von Humboldt Society.

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

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DO - 10.1016/S0039-6028(97)00732-2

M3 - Article

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VL - 397

SP - 191

EP - 196

JO - Surface Science

JF - Surface Science

SN - 0039-6028

IS - 1-3

ER -

Growth and the diffusion of platinum atoms and dimers on Pt(111)

Abstract

Keywords

ASJC Scopus subject areas

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