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Orientational Growth of Carbon Nanotube by Thermal CVD

Published online by Cambridge University Press:  15 March 2011

Shen Zhu ,
Ching-Hua Su ,
J. C. Cochrane ,
S. Gorti ,
S. Lehoczky ,
Y. Cui  and
A. Burger
Shen Zhu
Affiliation:
USRA, NASA/Marshall Space Flight Center, Huntsville, AL 35812, USA
Ching-Hua Su
Affiliation:
Microgravity Science and Applications Department, Science Directorate, SD47, NASA/Marshall Space Flight Center, Huntsville, AL 35812, USA
J. C. Cochrane
Affiliation:
USRA, NASA/Marshall Space Flight Center, Huntsville, AL 35812, USA
S. Gorti
Affiliation:
Microgravity Science and Applications Department, Science Directorate, SD47, NASA/Marshall Space Flight Center, Huntsville, AL 35812, USA
S. Lehoczky
Affiliation:
Microgravity Science and Applications Department, Science Directorate, SD47, NASA/Marshall Space Flight Center, Huntsville, AL 35812, USA
Y. Cui
Affiliation:
Center for Photonic Materials, Fisk University, Nashville, TN 37208, USA
A. Burger
Affiliation:
Center for Photonic Materials, Fisk University, Nashville, TN 37208, USA
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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.

Type
Article
Information
MRS Online Proceedings Library (OPL) , Volume 706: Symposium Z – Making Functional Materials with Nanotubes , 2001 , Z3.21.1
Copyright
Copyright © Materials Research Society 2002

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