Abstract
High-crystalline single-wall carbon nanotubes (SWNTs) have been produced by dc arc discharge evaporation of carbon electrode including 1 at.% Fe catalyst in H 2–N 2 mixture gas. The yield of as-grown SWNTs reaches higher than 70 at.%, and the form of SWNTs takes like a huge web. Raman scattering studies suggest that the diameter distribution of SWNTs can be controlled by varying the mixing ratio of H 2 and N 2 gas. Moreover, we can easily remove the coexisting Fe catalyst nanoparticles and obtain purified SWNTs. This new method for producing gram order of quantities of high-quality SWNTs will accelerate the studies of physical properties and practical applications of bulky SWNTs.
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