Characterization and formation of nanocrystalline diamonds in a-C/N films by filtered cathodic vacuum arc plasma

Nanocomposite Microstructure and Environment Self-Adapted Tribological Properties of Highly Hard Graphite-Like Film

“…Zarrabian et al [41] observed a phase transition from hexagonal to cubic diamond in DLC films prepared by plasma enhanced chemical vapor deposition (PECVD) in a dual electron cyclotron resonance (ECR)-rf glow discharge. For nanocrystalline diamond in tetrahedral amorphous carbon (ta-C) films prepared by FCVA, Hsieh et al [42] argued that the reason was the existence of a higher fraction of sp 3 bonding content, Silva et al [43,44] proposed that the graphic macroparticles were necessary for the preseeding of the diamond nanocrystals. Though the nanocrystalline diamond has been demonstrated in carbon films, it is difficult to understand very well the thermodynamic reason for the formation of the crystalline diamond phase in a-C film.…”

Ion coordination significantly enhances the photocatalytic activity of graphitic-phase carbon nitride

“…The peak at 708 cm −1 can be assigned to the out of plane bending mode of the C-N heterocycle, which exhibited a slight shift when compared to the peak at 709 cm −1 for the graphite-like domains with nitrogen atoms. 13 The small shift probably resulted from the 3-fold N-bridge capturing the metal cation, as shown in Fig. 1a.…”

“…The 13 C and 15 N cross-polarization magic-angle spinning (CP-MAS) NMR spectra for g-C 3 N 4 and C 3 N 4 -KCl were obtained to provide information about the effect of the ion coordination on the charge transfer. The 13 C spectra (Fig.…”

Effect of helium gas pressure on dc conduction mechanism and EMI shielding properties of nanocrystalline carbon thin films

“…hn0 4kBT (9) where E A and E A 0 are the activation energies at room temperature and at different temperatures. The activation energies (E A 0 ) for all the samples evaluated form Eq.…”