The mechanism of forming carbon nanostructures by electric arc-method

Abstract

The regularities of the formation of nanostructures during the evaporation of graphite by the electric ARC – method are studied. Described physicochemical processes in the synthesis reactor . At plasma temperatures taking into account the behavior of particles in electromagnetic fields with extreme temperature and pressure grants. A sequence of organization of matter in the process of forming a structure according to nano-dimensional characteristics is proposed. The self-organization of systems during electric arc evaporation of graphite or graphite-containing electrodes has been studied. The mechanisms of formation of soluble (fullerenes and fullerene-like structures) and insoluble (nanocomposites, CNTs, graphenes) carbon nanostructures are considered. The processes occurring in the electric arc synthesis reactor are analyzed: the process of distribution of charged particles in an electric arc at different times; processes taking place at the anode; the mechanism of carbon vapor formation during graphite evaporation; processes in the gas phase and on the walls of the reactor under the conditions of an electric arc discharge; model of the reactor space zones; formation of carbon nanostructures in the gas phase and on the inner surface of the reactor. use of doped electrodes and metal inserts (sleeves) as catalysts for the synthesis of carbon nanostructures. The sequence of processes in the formation of spherical carbon molecules is studied, and the processes and structural transformations are considered. In the research work, the products (fullerenes and fullerene-like structures, nanocomposites, VNT, graphenes) of electric arc synthesis are presented, and modern methods of analysis are used for their fixation and identification.

Creation and Comparison of Properties of Composites Based on Ceramics Filled with Straight or Helical Carbon Nanotubes for CJP 3D Printing Technology

“…However, the issue of large-scale controlled synthesis of carbon nanotubes (CNTs) remains unresolved. Today, there are various per- spective methods for the synthesis of soluble [8][9][10][11][12][13][14][15] and insoluble [16][17][18][19][20] carbon nanostructures (CNS), which can be used in the creation of new modern materials for 3D printing [21,22]. Nevertheless, of all the known methods of obtaining CNS, only electric arc evaporation of the anode can guarantee the synthesis of fullerene molecules in large quantities.…”