Hydrogen induced changes on the electronic structure of carbon nitride films

被引：26

作者：

Hammer, P ^{[1
]}

Victoria, NM ^{[1
]}

Alvarez, F ^{[1
]}

机构：

[1] Univ Estadual Campinas, IFGW, DFA, UNICAMP, BR-13083970 Campinas, SP, Brazil

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1998年 / 227卷

基金：

巴西圣保罗研究基金会;

关键词：

hydrogenated amorphous carbon-nitrogen alloys; amorphous carbon; photoelectron; infra-red and visible spectroscopy;

D O I：

10.1016/S0022-3093(98)00138-0

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of hydrogen on the electronic structure of amorphous carbon-nitrogen alloys (a-CN,) prepared by ion beam assisted (IBAD) deposition was studied by photoelectron spectroscopy. The effect of H on the local bonding structure of C and N atoms was inferred from the changes of the C Is and N Is core-level and the top of valence band spectra. The core-level spectrum of H free films are constituted of two N Is peaks identified as N bonded to sp(3) C and N bonded to sp(2) C, respectively. On increasing H content, the peak area ratio A(sp(3))/A(sp(2)) decreases and a new component associated with NH bonds emerges at 399.1 eV. Simultaneously, new features are observed at the top of the valence band. Besides the increasing NH absorption band (3350 cm(-1)), infrared spectra suggest a modification of the former disordered aromatic rings to a more Linear configuration. All the experimental information indicate that H promotes a polymeric-like structure. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：645 / 649

页数：5

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