Structure and property relationships of amorphous CNx: a joint experimental and theoretical study

On the relation between chemical composition and optical properties of detonation nanodiamonds

“…The spectra closely resemble the band structure reported for amorphous C and CN films [33][34][35][36][37]. Fig.…”

“…This hints towards the presence of odd-membered rings in the graphite shell [37]. The enhancement near 8 eV is from r bonds of C 2p [33,38]. Fig.…”

“…3(c)). The studies of amorphous CN films have demonstrated that an enhanced DOS near the Fermi level is due to lone pair of electrons from N populating the conduction band of sp 2 carbon thereby creating defects [33]. Also, for amorphous C films, p bonds of C 2p have been reported to contribute to the feature around 3-4 eV [34,36,37].…”

“…Also, for amorphous C films, p bonds of C 2p have been reported to contribute to the feature around 3-4 eV [34,36,37]. The enhanced density near the Fermi level was therefore attributed to contributions from C 2p p bonds and defect states in the sp 2 carbon shell owing to formation of 5-membered carbon atom rings, [33]: the N-induced fullerene-like defects as a result of buckling of graphitic carbon sheets are common in CN films [33,35]. This is consistent with the suppression of the 283.7 eV component of C 1s core level peak upon oxidation (Fig.…”

Investigation of the structure of carbon-nitrogen compounds

“…In 1990, it was predicted that there could exist the crystalline phase β -C 3 N 4 with a bulk modulus of 437 GPa, which is the most interesting crystalline compounds from the viewpoint of the high hardness and high thermal conductivity [1]. For comparison, the elastic modulus amounts to 443 GPa for diamond [2], 400 GPa for c -BN [3], 244 GPa for TiB 2 [4], and 226 GPa for SiC [3]. Korsunskii and Pepekin [5] performed quantum-mechanical calculations of the structure under consideration and drew a conclusion regarding the strength of the bonds and bond angles in the structure of the carbon nitride crystal.…”