Effect of tungsten on synthesis of multiwalled carbon nanotubes using cobalt as catalyst

被引：13

作者：

Ishikawa, Y

Jinbo, H

Yamanaka, H

机构：

[1] Nippon Inst Technol, Dept Elect & Elect Engn, Minami Saitama, Saitama 3458501, Japan

[2] Tomei Diamond Co Ltd, Oyama, Tochigi 3230807, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2006年 / 45卷 / 1-3期

关键词：

carbon nanotube; low-temperature synthesis; cobalt; tungsten carbide; hot-filament CVD;

D O I：

10.1143/JJAP.45.L50

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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 degrees 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 (Co + W) and Co combined with W2C (Co + W2C). The mechanism of the enhancement of CNT growth upon the addition of W or W2C was considered.

引用

收藏

页码：L50 / L53

页数：4

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