Eur. Phys. J. Appl. Phys.
Volume 29, Number 2, February 2005
|Page(s)||153 - 160|
|Section||Nanomaterials and Nanotechnologies|
|Published online||21 December 2004|
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
Department of Engineering and System Science, National Tsing Hua University, Hsinchu, Taiwan
2 Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
3 Materials Science Center, National Tsing Hua University, Hsinchu, Taiwan
4 Department of Material Science and manufacturing, Chinese Culture University, Taipei, Taiwan
Corresponding author: email@example.com
Revised: 10 May 2004
Accepted: 27 August 2004
Published online: 21 December 2004
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.
PACS: 81.05.Uw – Carbon, diamond, graphite / 81.07.De – Nanotubes / 61.46.+w – Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals
© EDP Sciences, 2005
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