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Compound growth and microstructure of carbon nanotube

Published online by Cambridge University Press:  03 March 2011

Zaoli Zhang ,
Lian Ouyang ,
Zujin Shi  and
Zhennan Gu
Zaoli Zhang*
Affiliation:
Beijing Laboratory of Electron Microscopy, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, 100080 Beijing, People's Republic of China
Lian Ouyang
Affiliation:
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic of China
Zujin Shi
Affiliation:
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic of China
Zhennan Gu
Affiliation:
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic of China
*
a)Address all correspondence to this author. Present address: Max-Planck-Institut für Metallforschung, Heisenbergstr. 3, D-70569 Stuttgart, Germany. e-mail: zlzhang@hrem.mpi-stuttgart.mpg.de
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Abstract

The compound growth of single-walled carbon nanotube (SWCNT) and multiwalled carbon nanotube (MWCNT), which formed a nanotube cable, was achieved by the chemical vapor deposition of natural gas on an Fe catalyst supported on SiO2–Al2O3 hybrid materials at 950 °C. The microstructure of nanotubes was characterized by high-resolution transmission electron microscopy (HRTEM). The SWCNTs encapsulated inside MWCNTs can be two, three, or even more in quantity with a diameter range from 1.0 nm to 2.0 nm. The diameter of SWCNT is controlled by the size of the catalyst nanoparticles. Some bundles of SWCNT and double-walled nanotubes were also found. The possible mechanism of compound growth is briefly discussed.

Type
Articles
Information
Journal of Materials Research , Volume 18 , Issue 10 , October 2003 , pp. 2459 - 2463
Copyright
Copyright © Materials Research Society 2003

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