Abstract
High yield of single-walled carbon nanotubes (SWCNTs) has been synthesized by dc arc discharge under low pressure of helium gas with a small amount of a mixture of nickel and iron powders. The highest yield of carbon nanotubes (CNTs) was obtained at low pressure of 100 Torr with 5 wt.% of metal mixture, in good contrast with the previous works. In addition, we introduced sulfur promoter to improve the yield, which gave rise to again the highest yield at low gas pressure. This was attributed to the higher arching temperature at lower gas pressure, facilitating an efficient formation of CNTs.
| Original language | English |
|---|---|
| Pages (from-to) | 245-251 |
| Number of pages | 7 |
| Journal | Synthetic Metals |
| Volume | 126 |
| Issue number | 2-3 |
| DOIs | |
| State | Published - 14 Feb 2002 |
Keywords
- Arc discharge
- Carbon nanotubes
- Low pressure