Neutron-diffraction studies of amorphous CNx materials

Walters, J.K. and Kuhn, M. and Spaeth, C. and Fischer, Henry E. and Richter, F. and Newport, Robert J. (1997) Neutron-diffraction studies of amorphous CNx materials. Physical Review B: Condensed Matter and Materials Physics, 56 (22). pp. 14315-14321. ISSN 0163-1829. (Full text available)

PDF
Download (3MB)
[img]
Preview
Official URL
http://dx.doi.org/10.1103/PhysRevB.56.14315

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: 04 Jul 2014 13:10
Resource URI: http://kar.kent.ac.uk/id/eprint/15993 (The current URI for this page, for reference purposes)
  • Depositors only (login required):

Downloads

Downloads per month over past year