Collect. Czech. Chem. Commun.
1992, 57, 2481-2493
https://doi.org/10.1135/cccc19922481
FEM Study of Oxidized Tungsten Surfaces
Jan Šotolaa, Vladimir Savkinb and Zlatko Knora
a J. Heyrovský Institute of Physical Chemistry and Electrochemistry, Czechoslovak Academy of Sciences, 182 23 Prague 8, Czechoslovakia
b Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
Abstract
Surface reconstruction of tungsten induced by oxygen chemisorption in the temperature range 300 K ≤ T ≤ 2200 K, has been investigated by means of FEM. Two types of surfaces have been used in this study: (i) hemispherical tungsten tips exposing small low index planes and stepped regions to the gas phase; (ii) polyhedral tungsten tips exposing large densely populated planes. A model for the reconstruction of a (100) plane is presented, explaining all the phenomena observed by FEM, TDS, LEED and MBS.
