Kinetics of Fullerene Formation in a Contact Arc Generator

Plasma Chem Plasma Process

et al. 2006

Synthesis of fullerenes from graphite powders of different grade was studied in a radiofrequency (RF) plasma reactor. Dependence of fullerene yield on the properties and feed rate of precursors and on the helium content of plasma gas was studied in details. The fullerene yield was influenced by the mean size and the thermal conductivity of graphite particles on the one hand, and the helium content of the gas phase on the other. Soot containing fullerene mixture of 5.9% was produced in best conditions found in this work. The main component of the fullerene mixture was C 60 . In addition, it contained about 30% of C 70 (corresponding to a C 60 /C 70 mass

Section: Discussionmentioning

confidence: 95%

“…To describe the kinetics of fullerene formation in arc plasma conditions a model was constructed [8] based on Smoluchovski's equation [9] the basic equation of statistical non-equilibrium physics. Particular model assumes that fullerenes are forming in helium atmosphere at temperatures above 2000 K only.…”

Section: Effects Of Precursors and Plasma Parameters Onmentioning

confidence: 99%

Effects of Precursors and Plasma Parameters on Fullerene Synthesis in RF Thermal Plasma Reactor

Szépvölgyi

Plasma Chem Plasma Process

et al. 2006

“…15 They are arranged in the spherical shape at the vertices of truncated icosahedron. Fullerenes are commonly produced in plasma reactions among carbon atoms and clusters at temperatures between 4000 and 8000 K. [16][17][18][19][20][21][22][23][24][25] Unlike other allotropes, fullerenes are soluble in non-polar solvents, such as toluene, benzene, chlorobenzene, dichloromethane, carbon disulfide and 1,2,3-trichloropropane. [26][27][28] Fullerenes are practically insoluble in methanol and highly insoluble in water.…”

Section: O N L I N E F I R S T Hydrophobic Carbon Based Nanoparticlesmentioning

confidence: 99%

Self-assembly of carbon based nanoparticles films by Langmuir-Blodgett method

Stanković

Todorovic-Markovic

2020

JSCS

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“…Our first results on fullerene synthesis in an RF reactor have promising results [8]. The synthesis conditions were estimated by a kinetic model of fullerene formation constructed previously [9]. This model assumes that fullerenes form in an inert atmosphere at temperatures above 2000 K [10].…”

Section: Introductionmentioning

confidence: 99%

RF thermal plasma processing of fullerenes

J. Phys. D: Appl. Phys.

Mohai

et al. 2006

This paper presents results on fullerene formation during the processing of different graphite powders in an RF thermal plasma reactor. Graphite powders of different particle size and purity were fed into the reactor (Aldrich, KS4). Optical emission spectroscopy of atomic and molecular species is used as a diagnostic tool of the RF plasma flame. It was found that rotational and vibrational temperatures of C2 radicals depend on the feed rate of the precursor used. The volumes of RF plasma flame during processing of graphite powders have been calculated. By analysing scanning electron microscopy micrographs of soot, the evaporation rate of the precursors used has been evaluated as well. Based on the obtained values of volumes of plasma flame and evaporation rate of starting powders, the concentration of C2 radicals has been calculated.