Open AccessProduction of Single-Walled Carbon Nanotubes by Modified Arc Discharge Method
Author(s) -
Mohammad Jellur Rahman,
Tetsu Mieno
Publication year - 2013
Publication title -
japanese journal of applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 129
eISSN - 1347-4065
pISSN - 0021-4922
DOI - 10.7567/jjap.52.056201
Subject(s) - electric arc , soot , current (fluid) , carbon nanotube , magnetic field , arc (geometry) , production rate , perpendicular , materials science , carbon fibers , electric discharge in gases , analytical chemistry (journal) , atomic physics , mechanics , chemistry , electrode , composite material , combustion , physics , thermodynamics , geometry , environmental chemistry , industrial engineering , mathematics , organic chemistry , quantum mechanics , composite number , engineering
Single-walled carbon nanotubes (SWNTs) are synthesized by the arc discharge method in He gas, where three directions of discharge current relative to gravity are selected and their production rates are compared. The soot production rate for the upward discharge current is larger than those for the horizontal and downward discharge currents. Also, the qualities of the produced SWNTs for the three cases are almost the same. The effect of a steady magnetic field (3.0 mT) perpendicular to the discharge current direction (J×B arc discharge) is also examined. This magnetic field increases the soot production rate for all three discharge current directions. The estimated ratio of the number of SWNT bundles to the number of carbon particles is higher for the upward discharge current in the case of B = 0. This ratio increases significantly for the horizontal and downward discharge currents when a magnetic field is applied.
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