H- and O-induced compressive surface stress on Pt(111): Experiments and density functional theory calculations

被引：11

作者：

Tian, Zhen ^{[1
]}

Sander, Dirk ^{[1
]}

Negulyaev, Nikolay N. ^{[2
]}

Stepanyuk, Valeri S. ^{[1
]}

Kirschner, Juergen ^{[1
]}

机构：

[1] Max Planck Inst Mikrostrukturphys, D-06120 Halle, Germany

[2] Univ Halle Wittenberg, Fachbereich Phys, D-06099 Halle, Germany

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 11期

关键词：

ADSORPTION; RECONSTRUCTION; OXYGEN; DESORPTION; METALS; GAS;

D O I：

10.1103/PhysRevB.81.113407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Surface-stress changes induced by the adsorption of oxygen and hydrogen on clean Pt(111) are measured at 320 K under UHV conditions with an optical crystal curvature method and are calculated using density-functional theory. A compressive surface-stress change is measured upon exposure of Pt(111) to either H(2) or O(2). The magnitude of the adsorbate-induced surface-stress change is in quantitative agreement with our calculations. Our results indicate that both electropositive (H) and electronegative (O) adsorbates may induce a compressive surface-stress change. The significance of these results for the understanding of adsorbate-induced surface stress is discussed.

引用

页数：4

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