X-ray diffraction studies of the effects of N incorporation in amorphous CNx, materials

Walters, J.K. and Kuhn, M. and Spaeth, C. and Dooryhee, E. and Newport, R.J. (1998) X-ray diffraction studies of the effects of N incorporation in amorphous CNx, materials. Journal of Applied Physics, 83 (7). pp. 3529-3534. ISSN 0021-8979. (Full text available)

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http://dx.doi.org/10.1063/1.366566

Abstract

The effects of nitrogen incorporation on the atomic-scale structure of amorphous CNx samples have been studied for 0, 5, 20, and 30 at. % N concentration, by x-ray diffraction. Significant differences in the structure are observed on the incorporation of only 5 at. % N, and the changes in structure continue as further N is added. From the experimental data, we are able to obtain directly the average bond distances and then calculate the average bond angles for each of the samples. The average first neighbor distance shows a gradual decrease from 1.55 Angstrom for 0 at. % N, to 1.44 Angstrom for 30 at. % N, and a similar trend is observed in the position of the second neighbor peak. This gives a corresponding increase in the average bond angle from 108 degrees to 114 degrees. The results show an increase in the fraction of sp(2) bonded carbon atoms with increasing N concentration, and there is evidence for the presence of significant numbers of C=N and C=N bonds. These results are also consistent with stress, hardness, and optical gap measurements for these samples. (C) 1998 American Institute of Physics. [S0021-8979(98)03907-3].

Item Type: Article
Subjects: Q Science
Q Science > QC Physics
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group
Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: J.M. Smith
Date Deposited: 29 Apr 2009 13:16
Last Modified: 02 Dec 2011 11:50
Resource URI: http://kar.kent.ac.uk/id/eprint/15992 (The current URI for this page, for reference purposes)
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