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Single-walled carbon nanotubes (SWCNTs) with high purity and very narrow diameter distribution have been synthesized using the dc arc-discharge method with Y–Ni alloy as catalyst and selenium (Se) as promoter. The SWCNTs show a very narrow diameter distribution mainly at about 1.5nm, and can further be readily purified up to >99% purity with traditional purification including HNO 3 reflux...
The pyrolysis of iron(II) phthalocyanine on an Au substrate under an atmosphere of ethanol/argon was found to produce recumbent bamboo-like multi-walled carbon nanotubes. By changing the pattern of the Au bars in the substrate, the configuration of the nanotube could be changed. A possible mechanism for the formation of these patterns is suggested.
Bamboo-like carbon nanotubes (NTs) were synthesized by a pyrolysis of iron(II) phthalocyanine under Ar/H 2 at 1000 o C. Transmission electron microscopy was used to investigate the bamboo-like nanotubes. The growth mechanism of the bamboo-like NTs is proposed in detail, especially the formation process of compartments of the bamboo-like NTs. The graphite sheath sliding out from the...
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