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Synthesis of various forms of carbon nanotubes by AC arc discharge

โœ Scribed by Huang Zeng; Ling Zhu; Guangming Hao; Rongsheng Sheng

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
388 KB
Volume
36
Category
Article
ISSN
0008-6223

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โœฆ Synopsis

Various forms of nanotubes

were produced by the AC arc discharge method at low He pressure. Some forms of nanotubes different from those which had been reported previously were found in the soot (but not the cathode deposit). These were the carbon nanocapsule, carbon cone-shaped nanotube and the carbon toroidal nanotube, respectively.

The difference between the formation mechanisms by AC arc discharge and DC arc discharge was discussed.

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Using a graphite rod with a hole filled with the powder of a mixture of Y-Ni alloy and graphite or calcium carbide and nickel as anode, single-wall carbon nanotubes (SWCNTs) with high yield were produced in quantity of tens of grams a day under the arc conditions of 40 ฯณ 60 A d.c. and helium pressur