Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (08): 718-722.doi: 10.3866/PKU.WHXB20010810

• ARTICLE • Previous Articles     Next Articles

CVD Synthesis and Diameter Distribution of SingleWalled Carbon Nanotubes

Wei Zhong;Chen Yan;Liu Zhong-Fan   

  1. Center of Nanoscale Science and Technology, College of Chemistry ＆Molecular Engineering, Peking University,Beijing　100871
  • Received:2001-02-27 Revised:2001-04-05 Published:2001-08-15
  • Contact: Liu Zhong-Fan E-mail:lzf@chem.pku.edu.cn

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Abstract: Singlewalled carbon nanotubes (SWNTs) were synthesized by the decomposition of methane on Al2O3 supported Fe,Co,Ni,Ru catalysts at 850 ℃. The diameters of the single walled carbon nanotubes were in the range of 0.8～5 nm. The amorphous carbon impurity could be reduced by pretreatment of catalysts at 1100 ℃. Raman spectra showed that the diameter distributions of the SWNTs were mainly influenced by the reaction temperature. At lower temperature small diameter nanotubes were favored and better selectivity of diameter could be achieved.

Key words: Single-walled carbon nanotubes, CVD, Raman spectroscopy, Diameter distribution