Preparation of Regular Coiled Carbon Nanotubes by Reduced-pressure Catalytic Chemical Vapor Deposition

Abstract

Abstract: Regular coiled carbon nanotubes were prepared by catalytic chemical vapor deposition(C=CVD) on finely divided Co nano-particles supported on silica gel at reduced pressure and lower gas flow rates. The morphology and the distribution of the geometrical parameters of the coiled carbon nanotubes were examined by TEM,while the graphitization of coil tube,coil bend and coil node were analyzed by HRTEM. The influences of the pH values and the reaction pressure on the growth of the coiled carbon nanotubes were also discussed. With this modified C=CVD approach,the amorphous carbon generally coated on the carbon nanotubes was greatly decreased.

Key words: Carbon nanotubes, Coil, Chemical vapor deposition, Transmission electron microscopy

CLC Number:

O646

TrendMD:

LU Mei, GUO Xin-Yong, WANG Zhe, LI Hu-Lin . Preparation of Regular Coiled Carbon Nanotubes by Reduced-pressure Catalytic Chemical Vapor Deposition[J]. Chem. J. Chinese Universities, 2004, 25(8): 1541.

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Preparation of Regular Coiled Carbon Nanotubes by Reduced-pressure Catalytic Chemical Vapor Deposition

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