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The growth of bunched and multi-circularly wrapped carbon nanotubes on bulk magnetic alloys by microwave enhanced hot-filament CVD with a dilute gas of ammonia

Published online by Cambridge University Press:  21 December 2004

H. Y. Miao ,
J. T. Lue ,
S. K. Chen ,
C. H. Tsau  and
M. S. Ouyang
H. Y. Miao
Affiliation:
Department of Engineering and System Science, National Tsing Hua University, Hsinchu, Taiwan
J. T. Lue*
Affiliation:
Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
S. K. Chen
Affiliation:
Materials Science Center, National Tsing Hua University, Hsinchu, Taiwan
C. H. Tsau
Affiliation:
Department of Material Science and manufacturing, Chinese Culture University, Taipei, Taiwan
M. S. Ouyang
Affiliation:
Department of Engineering and System Science, National Tsing Hua University, Hsinchu, Taiwan
*
[email protected]
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Abstract

Bunched and multi-circularly wrapped carbon nanotubes (CNT) are observed to grow on alloy substrates based on iron group metals and copper by a microwave enhanced hot-filament method with a dilute gas of ammonia at a proper RF self-bias. The grown size of CNTs embodied in the grain sizes of conducting bulk alloy catalysts such as Cu-Ni, Cu-Fe, Cu-Co, and Cu-Ni-Fe-Co are controlled by a precursor time of hydrogen plasma etching. Species with different structural features and homogenization of CNTs samples are produced crucially attributed to various reactant gases and self-bias induced by the radio frequency field.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 29 , Issue 2 , February 2005 , pp. 153 - 160
Copyright
© EDP Sciences, 2005

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