HIGH-RESOLUTION ELECTRON-ENERGY-LOSS SPECTROSCOPY OF ISOLATED HYDROXYL-GROUPS ON ALPHA-AL2O3(0001)

被引：82

作者：

COUSTET, V ^{[1
]}

JUPILLE, J ^{[1
]}

机构：

[1] LAB ST GOBAIN, CNRS, SURFACE VERRE & INTERFACES, BP 135, F-93303 AUBERVILLIERS, FRANCE

来源：

SURFACE SCIENCE | 1994年 / 307卷 / 1 -3 pt B期

关键词：

D O I：

10.1016/0039-6028(94)91557-1

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：

Hydroxylated (0001) faces of alpha-Al2O3 bulk crystals have been examined by high-resolution electron-energy-loss spectroscopy (HREELS). Surface charging being eliminated by means of a defocused electron beam, it is shown that the electron fluence can be low enough to avoid significant damages. A resonance scattering from chemisorbed OH groups is evidenced, at impact energies lower than 12 eV, by strong enhancements of the cross sections for excitation of both the fundamental (3720 cm-1) and the first overtone (7270 cm-1) of the stretching mode and by the angular distribution of the inelastically scattered electrons.

引用

页码：1161 / 1165

页数：5

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