New model of the initial stages of Si(111)-(7x7) oxidation

被引：86

作者：

Dujardin, G ^{[1
]}

Mayne, A ^{[1
]}

Comtet, G ^{[1
]}

Hellner, L ^{[1
]}

Jamet, M ^{[1
]}

LeGoff, E ^{[1
]}

Millet, P ^{[1
]}

机构：

[1] UNIV PARIS 11, UTILISAT RAYONNEMENT ELECTROMAGNET LAB, F-91405 ORSAY, FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.76.3782

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By combining scanning tunneling microscopy (STM) and ultraviolet photoelectron spectroscopy, we show that the adsorption of single O-2 molecules on Si(111)-(7 x 7) produces essentially molecular sites, seen as bright individual sites in STM topographs, which are stable at room temperature. Atom-resolved STM studies also reveal that these molecular sites react very efficiently with further O-2 and H2O molecules. This is shown to account for the saturation at low exposure of the molecular site density and for the apparent decay lifetime of these molecular sites.

引用

页码：3782 / 3785

页数：4

共 23 条

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