Coiled carbon nanotubes growth via reduced-pressure catalytic chemical vapor deposition

Mei Lu, Wei Min Liu, Xin Yong Guo, Hu Lin Li

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Coiled carbon nanotubes were prepared by catalytic chemical vapor deposition (CCVD) on finely divided Co nano-particles supported on silica gel under reduced pressure and relatively low gas flow rates. The morphology and the graphitization of the coil tube, coil bend, and coil node of the coiled carbon nanotubes were examined by transmission electron microscope (TEM). The influence of pH value, reaction pressure, and flow rate of C2H 2 on the growth of the coiled carbon nanotubes were also discussed. With the drastic reduction in the consumption of C2H2 and lower required pressure with the modified CCVD approach, the amount of amorphous carbon coated on the carbon nanotubes was shown to be greatly reduced. Most importantly, this method offers a preferable alternative for the efficient, environment-friendly and safer growth of coiled carbon nanotubes.

Original languageEnglish
Pages (from-to)805-811
Number of pages7
JournalCarbon
Volume42
Issue number4
DOIs
StatePublished - 2004
Externally publishedYes

Keywords

  • A. Carbon nanotubes
  • B. Chemical vapor deposition
  • C. Transmission electronic microscopy (TEM)

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