4 research outputs found
Electric Discharge Plasmochemical Synthesis of Carbon Nanomaterials
High-energy electric discharge technologies (electric breakdown and HF volume discharge in organic
media) for a large scale synthesis of amorphous carbon (AC) are developed. A destruction of hydrocarbon
molecules into separate fragments occurs during such processing of organic media, what results in AC
formation in the process of ultra-fast cooling of the clusters. To investigate the influence of chemical nature
of working media, organic liquids and gases from the class of arenes with sp2-hybridisation of carbon atoms
in molecule and alkanes with sp3-hybridisation were used. Performed XRD, HRTEM and Raman studies
showed that produced powders are typical amorphous materials with significant degree of disorder. But
only in the case of electric breakdown of alkanes, carbon nanomaterials with complex core-shell structure
were discovered. Individual particles of onion-like carbon (OLC) consist of ~ 5 nm core surrounded by
graphitic shell of 5-6 layers. Synthesized OLC is used as antifriction additives to industrial oils and as material for electromagnetic waves shielding. The statistical analysis of the atomic structure of the
synthesized materials using reverse Monte Carlo and Voronoi-Delaunay methods was performed.
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