Spectroscopic study of carbon nitride nanoparticles synthesised by laser pyrolysis

Angular and Local Spectroscopic Analysis to Probe the Vertical Alignment of N-doped Well-separated Carbon Nanotubes

“…Concerning C 3 , it has been identified on two different spectra, the bunch of CNTs by EELS (Figure 6, line), and the analysis at 45°by NEXAFS (Figure 5, line + symbol). As previously mentioned, we associate this feature with topological defects of graphite CdC bonds, such as were recorded from amorphous carbon-based thin films, 25 carbon nitride nanopowders, 14 or fullerenes. 13 The absence of this feature from the individual MWCNT EEL spectrum indicates the good graphitization quality of the nanotubes walls.…”

“…C 2 is less localized but already present in HOPG, C 3 can be related to pentagonal topological defects as observed in nitrogen-free fullerene-like material, 13 while C 4 involves manifold C-N bonds. 11,14 In other studies, a feature close to C 4 was attributed to nickelcarbon bonds in Ni-diamond-like carbon thin films. 15 For HiPCO grown CNTs, a feature energetically close was proposed as the NEXAFS signature of the helicity of the N-free single-walled CNTs (SWCNT).…”

“…Changing the incidence angle, NEXAFS spectra reveal additional localized π* states: C 2 , 286.8 (±0.1) eV; C 3 , ∼287.3 eV; C 4 , 288.5 (±0.1) eV. C 2 is less localized but already present in HOPG, C 3 can be related to pentagonal topological defects as observed in nitrogen-free fullerene-like material, while C 4 involves manifold C−N bonds. , …”

Methods and strategies for the synthesis of diverse nanoparticles and their applications: a comprehensive overview

“…111 Marino et al synthesized carbon nitride NPs with varying nitrogen incorporation between 2% and 20% using laser pyrolysis. 112 Jansa et al fabricated carbon NPs using pulsed laser pyrolysis of hydrocarbons and found that at same experimental parameters, the carbon NPs produced using benzene showed higher conductivity than those produced using either acetylene or ethylene. 113 They also found the variation of size of NPs with varying laser power.…”

Structure of a-C:N:H prepared from ammonia

“…Since that time, much experimental work has been carried out on a-C:N:H. Many studies have focused on the optical and electronic properties of the material, [7][8][9][10][11][12][13] with additional interest arising from the fact that it may form a phase harder than undoped a-C:H. 14 Structural investigations hitherto have mainly involved infrared and Raman spectroscopy studies, [15][16][17][18][19][20][21][22][23][24][25][26][27] although other methods, such as photoemission and x-ray absorption near edge sspectroscopy (XANES) have been applied with varying degrees of success. [22][23][24][28][29][30] Because of the possible technological applications of these properties, and certainly from a fundamental point of view, it is important to examine the effects of nitrogen incorporation by probing the atomic structure of this material.…”