Nano Archive

Growth deceleration of vertically aligned carbon nanotube arrays: Catalyst deactivation or feedstock diffusion controlled?

Xiang, Rong and Yang, Zhou and Zhang, Qiang and Luo, Guohua and Qian, Weizhong and Wei, Fei and Kadowaki, Masayuki and Einarsson, Erik and Maruyama, Shigeo (2008) Growth deceleration of vertically aligned carbon nanotube arrays: Catalyst deactivation or feedstock diffusion controlled? JOURNAL OF PHYSICAL CHEMISTRY C, 112 (13). pp. 4892-4896.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp710730x

Abstract

Feedstock and byproduct diffusion in the root growth of aligned carbon nanotube arrays is discussed. A non-dimensional modulus is proposed to differentiate catalyst-poisoning controlled growth deceleration from one which is diffusion controlled. It is found that, at the current stage, aligned multiwalled carbon nanotube arrays are usually free of feedstock diffusion resistance while single-walled carbon nanotube arrays are already suffering from a strong diffusion resistance. The method presented here is also able to predict the critical lengths in different CVD processes from which carbon nanotube arrays begin to meet strong diffusion resistance, as well as the possible solutions to this diffusion caused growth deceleration.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Physical Science > Nano objects
Material Science > Nanochemistry
ID Code:553
Deposited By:IoN
Deposited On:20 Jan 2009 13:27
Last Modified:29 Jan 2009 15:34

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