Walters, J.K. and Kuhn, M. and Spaeth, C. and Fischer, H. and Richter, F. and Newport, R.J. (1997) Neutron-diffraction studies of amorphous CNx materials. Physical Review B, 56 (22). pp. 14315-14321. ISSN 0163-1829.
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| Official URL http://dx.doi.org/10.1103/PhysRevB.56.14315 |
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Abstract
The results of neutron-diffraction experiments performed on two samples of amorphous CNx, with nitrogen concentrations of 5 and 30 at. %, prepared by a combination of filtered cathodic are and Kaufman-type ion source, are presented. Increasing the N content of the samples is seen to cause a decrease of the average bond length and the first coordination number. An increase in the average bond angle from 113 degrees to 121 degrees is also observed. The pair-distribution functions indicate that N incorporation results in some transformation of sp(3) C sites to sp(2) sites, but there is no evidence for N inducing the formation of crystalline graphitic clusters, and the overall structure remains amorphous. A direct subtraction of the two data sets emphasizes the loss of sp(3) bonds and the increasing sp(2) character of the higher-N-content sample, and shows the occurrence of a variety of bonding environments for N. More limited information on second neighbor correlations involving N is also revealed.
| Item Type: | Article |
|---|---|
| Subjects: | Q Science |
| Divisions: | Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group |
| Depositing User: | J.M. Smith |
| Date Deposited: | 29 Apr 2009 13:34 |
| Last Modified: | 02 Dec 2011 11:48 |
| Resource URI: | http://kar.kent.ac.uk/id/eprint/15993 (The current URI for this page, for reference purposes) |
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