What is the major disadvantage in Arc Discharge method of CNT production?

What is the major disadvantage in Arc Discharge method of CNT production? Correct Answer Little control over alignment of nanotubes

Arc discharge method is one of the primary methods of CNT synthesis. It produces enormous amounts of CNTs but the major disadvantage it has is that there is less control over the alignment (i.e., chirality) of the produced nanotubes. This is very important for their characterization and role. Moreover, the nanotubes produced during this method need to be further purified because of the metallic catalyst involved in the reaction.
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