Oxygen-induced bilayer formation from silver monolayers on W(110)

被引：18

作者：

Elbe, A ^{[1
]}

Meister, G ^{[1
]}

Goldmann, A ^{[1
]}

机构：

[1] Univ Kassel, Fachbereich Phys, D-34132 Kassel, Germany

来源：

SURFACE SCIENCE | 1998年 / 397卷 / 1-3期

关键词：

angle-resolved photoemission; chemisorption; electron energy loss spectroscopy; low index single crystal surfaces; metal and interfaces; oxygen; silver; tungsten;

D O I：

10.1016/S0039-6028(97)00754-1

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：

We have investigated the room-temperature interaction of molecular oxygen with ultrathin silver layers deposited epitaxially on W(110), using angle-resolved ultraviolet photoelectron spectroscopy (ARUPS) and high-resolution electron energy-loss spectroscopy (HREELS). We present experimental evidence that monolayer Ag films are converted into double-layer Ag islands by O-2 after exposures of 2 x 10(-5) Torr.s. This rearrangement opens Ag-free regions of W(110) which are covered by ordered atomic oxygen layers. In contrast, Ag bilayers are not affected by oxygen at all. Obviously, the Ag monolayer on W(110) opens a very effective reaction channel for the rapid dissociation of O-2 and a subsequent site exchange between Ag atoms and atomic oxygen. (C) 1998 Elsevier Science B.V.

引用

页码：346 / 353

页数：8

共 34 条

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[Anonymous], SURFACE SCI REPORTS

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