TEMPERATURE-DEPENDENCE OF THE SURFACE-DIFFUSION COEFFICIENT OF K ATOMS ON PD(111) MEASURED WITH PEEM

Authors
SNABL M ONDREJCEK M CHAB V STENZEL W CONRAD H BRADSHAW AM
Citation
M. Snabl et al., TEMPERATURE-DEPENDENCE OF THE SURFACE-DIFFUSION COEFFICIENT OF K ATOMS ON PD(111) MEASURED WITH PEEM, Surface science, 352, 1996, pp. 546-551
Citations number
14
Categorie Soggetti
Chemistry Physical
Journal title
Surface science → ACNP
ISSN journal
00396028
Volume
352
Year of publication
1996
Pages
546 - 551
Database
ISI
SICI code
0039-6028(1996)352:<546:TOTSCO>2.0.ZU;2-C
Abstract
The surface diffusion of potassium on Pd{111} has been studied in real time as a function of temperature between 100 and 190 K in the limit of zero concentration (Theta < 0.05 ML) using photoelectron emission m icroscopy (PEEM). Very fast migration of K atoms was observed on flat, quasi-one-dimensional regions of the surface between the step bunches . The temperature dependence of the diffusion coefficient indicates an activated process with an energy barrier of 66 +/- 11 meV.