AN X-RAY PHOTO-ELECTRON SPECTROSCOPIC INVESTIGATION OF THE AIR-FORMED FILM ON COPPER

被引:93
作者
CHAWLA, SK
RICKETT, BI
SANKARRAMAN, N
PAYER, JH
机构
[1] Department of Materials Science and Engineering, Case Western Reserve University, Cleveland
关键词
D O I
10.1016/0010-938X(92)90038-5
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The composition and the structure of the film formed on copper by exposure to ambient air for 24 h were investigated by X-ray photo-electron spectroscopy (XPS). This characterization of the native oxide on copper provides a basis for subsequent exposures in mixed flowing gas systems. Using angle-resolved XPS, it was observed that only the univalent, diamagnetic Cu+ species was present in the film. The film was modelled as a two-layer structure with an inner layer Of CU2O and an outer layer comprising adventitious hydrocarbon and bound hydroxyl and water, with determined thicknesses of approximately 1.6 and 0.8 nm, respectively.
引用
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页码:1617 / 1631
页数:15
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