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Immobilization of CNT on Bamboo Charcoal by TEOS Vapor

Published online by Cambridge University Press:  01 February 2011

Jiangtao Zhu ,
Fung Luen Kwong  and
Dickon Hang Leung Ng
Jiangtao Zhu
Affiliation:
[email protected], The Chinese University of Hong Kong, Department of Physics, Shatin, New Territories, Hong Kong, N/A, Hong Kong
Fung Luen Kwong
Affiliation:
[email protected], The Chinese University of Hong Kong, Department of Physics, Shatin, New Territories, Hong Kong, N/A, Hong Kong
Dickon Hang Leung Ng
Affiliation:
[email protected], The Chinese University of Hong Kong, Department of Physics, Shatin, New Territories, Hong Kong, N/A, Hong Kong
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Abstract

Carbon nanotubes (CNTs) are successfully immobilized on a bamboo charcoal by chemical vapor deposition of gaseous tetraethyl orthosilicate (TEOS). Electron microscopies, Raman spectroscopy and electron energy loss spectroscopy are used to characterize the sample. The CNTs found on the bamboo charcoal support were several microns long, and their diameters ranged from 50nm to 300nm. From the high resolution transmission electron microscopic analysis, we found that the CNTs were composed of ∼30 layers of graphitic carbon sheets. Amorphous droplets were also found at the tips of the CNTs. This suggested that the growth of the CNT was via a vapor-liquid-solid mechanism. The amorphous droplets contained calcium, silicon and oxygen. The calcium impurity was originated from the bamboo while the silicon impurity was supplied by the TEOS. CNTs partially filled with calcium silicate were also found. It was evident that calcium silicate had played a critical role in the formation of these CNTs.

Keywords

nanostructurechemical vapor deposition (CVD) (chemical reaction)transmission electron microscopy (TEM)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1081: Symposium P – Carbon Nanotubes and Related Low-Dimensional Materials , 2008 , 1081-P04-06
Copyright
Copyright © Materials Research Society 2008

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