Spectroscopic Evidence for Ag(III) in Highly Oxidized Silver Films by X-ray Photoelectron Spectroscopy

被引：223

作者：

Kaspar, Tiffany C. ^{[1
]}

Droubay, Tim ^{[1
]}

Chambers, Scott A. ^{[1
]}

Bagus, Paul S. ^{[2
]}

机构：

[1] Pacific NW Natl Lab, Richland, WA 99354 USA

[2] Univ N Texas, Dept Chem, Denton, TX 76203 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 49期

关键词：

PHOTOIONIZATION CROSS-SECTIONS; LEVEL BINDING-ENERGIES; SURFACE CHARACTERIZATION; THERMAL-DECOMPOSITION; ELECTRONIC-STRUCTURE; TRANSITION-METALS; CHEMICAL-SHIFTS; OXIDE FILMS; SPECTRA; OXIDATION;

D O I：

10.1021/jp107914e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

In situ X-ray photoelectron spectroscopy (XPS) was utilized to identify the chemical state of silver in a range of silver oxide thin films obtained by codeposition of silver and atomic oxygen. A highly oxidized silver species was observed at an unexpectedly low Ag 3d(5/2) binding energy (BE) of 366.8 eV with an associated broad satellite at 368.2 eV; this species was assigned as Ag(III). It was found to be highly unstable in vacuum but could be regenerated by further exposure to atomic oxygen. Both BE shifts and intensity changes of the O Is peak were found to correlate with changes in the silver oxidation state. The theoretical XPS spectrum of high spin Ag(III) was calculated for both an isolated cation and an embedded AgO(6) cluster.

引用

页码：21562 / 21571

页数：10

共 55 条

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