OXIDATION IN AIR AND THERMAL DESORPTION ON PBTE, SNTE AND PB0.8SN0.2TE SURFACES

被引：59

作者：

BETTINI, M

RICHTER, HJ

机构：

[1] Institut für Angewandte Festkörperphysik der Fraunhofer-Gesellschaft, Freiburg

来源：

SURFACE SCIENCE | 1979年 / 80卷 / 01期

关键词：

D O I：

10.1016/0039-6028(79)90694-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

XPS and LEED measurements of the oxidation in air and thermal desorption on PbTe, SnTe and Pb0.8Sn0.2Te surfaces are presented. The initial cleaning of the surface for the oxidation experiments by Ar sputtering (3 kV) yields immediately a perfect, unreconstructed Pb1-x-SnxTe surface. The oxidation process is determined by the preferential oxidation of Sri. The surface is strongly depleted of tellurium and enriched with lead and especially tin. During thermal desorption tellurium oxide is lost first from the surface. Lead and tin oxide are too stable to become thermally desorbed during our heat treatment (350°C, 30 min). The oxidation and thermal desorption can be understood as a competing chemical reaction between the stable SnO2 and the unstable TeO2. © 1979.

引用

页码：334 / 343

页数：10

共 13 条

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