Abstract
The results of neutron and x-ray diffraction experiments performed on a range of nitrogen-doped amorphous hydrogenated carbon (, where x = 0, 6, 8 and 10 at.%) samples are presented. Changes in the average bond lengths and bond angles are observed as the nitrogen content is varied; however, no qualitative structural differences are seen between the samples. Both CH and NH correlations are seen directly, and N - H bonds are shown to be favoured over C - H at the highest N concentration. Also for the sample with the highest N content, the data provide evidence for the presence of a small quantity of triple bonds, although this is not the dominant bonding environment of N. The data indicate that N incorporation may result in some transformation of C sites to sites, but there is no evidence for N inducing the formation of graphitic clusters, and the structure remains disordered overall.
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