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Orientational Growth of Carbon Nanotube by Thermal CVD

  • Shen Zhu (a1), Ching-Hua Su (a2), J. C. Cochrane (a1), S. Gorti (a2), S. Lehoczky (a2), Y. Cui (a3) and A. Burger (a3)...

Abstract

Carbon nanotubes are synthesized using thermal chemical vapor deposition. Various temperature and pressure are used to fabricate carbon nanotubes. It is found that the nanotube-diameter distribution mainly depends on the growth-temperature. With the substrate surface normal either along or against the gravity vector, different growth orientations of multi-walled carbon nanotubes are observed by scanning electron microscopy although the Raman spectra are similar for samples synthesized at different locations. The sizes of these carbon nanotubes in each sample are quite uniform and the length of the tube is up to hundreds of micrometers. These results suggest the gravitation effects in the growth of long and small diameter CNT.

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Orientational Growth of Carbon Nanotube by Thermal CVD

  • Shen Zhu (a1), Ching-Hua Su (a2), J. C. Cochrane (a1), S. Gorti (a2), S. Lehoczky (a2), Y. Cui (a3) and A. Burger (a3)...

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