摘要
Optical emission spectra (OES) of the plasma during synthesis of carbon nanotubes (CNTs) were in-situ examined for the purpose of understanding the formation mechanism of CNTs. It is observed that simultaneous presence of abundant amount of neutral Fe-atoms and the neutral (or singly-ionized) carbon-atoms in the plasma, but without the induction of carbon clusters, is necessary for growing CNTs. The optimum chamber pressure required is 400 Torr in 100 W microwave powers, which corresponds to 5000 K plasma temperature. The CNTs are presumed to form via gas phase nucleation process and thus obtained CNTs are multi-wall, approximately 30-70 nm in diameter.
原文 | English |
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頁(從 - 到) | 999-1003 |
頁數 | 5 |
期刊 | Diamond and Related Materials |
卷 | 13 |
發行號 | 4-8 |
DOIs | |
出版狀態 | Published - 2004 4月 |
All Science Journal Classification (ASJC) codes
- 電子、光磁材料
- 一般化學
- 機械工業
- 材料化學
- 電氣與電子工程