Effect of Tungsten on Synthesis of Multiwalled Carbon Nanotubes Using Cobalt as Catalyst
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概要
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The effect of W and W2C on the synthesis of multi-walled carbon nanotubes (MWCNTs) by hot-filament-assisted chemical vapor deposition (HFCVD) using Co particles as a catalyst was examined. W or W2C was vacuum-evaporated onto Co particles supported by zeolite and used as a catalyst in CNT synthesis. Methanol was used as a carbon source. Synthesis of CNTs was carried out at about 400°C. The density of the MWCNTs synthesized using only Co as a catalyst was the lowest, and was sequentially higher when using Co combined with W ($\text{Co} + \text{W}$) and Co combined with W2C ($\text{Co} + \text{W$_{2}$C}$). The mechanism of the enhancement of CNT growth upon the addition of W or W2C was considered.
- 2006-01-25
著者
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Ishikawa Yutaka
Department Of Electrical And Electronics Engineering Nippon Institute Of Technology
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Jinbo Hironobu
Department Of Electrical And Electronics Engineering Nippon Institute Of Technology
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Yamanaka Hiroshi
Tomei Diamond Co., Ltd., 4-5-1 Jyoto, Oyama, Tochigi 323-0807, Japan
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Yamanaka Hiroshi
Tomei Diamond Co. Ltd.
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