Synthesis of high quality single-walled carbon nanotubes with purity enhancement and diameter control by liquid precursor Ar–H2 plasma spraying.

Highlights: [•] A new plasma process is proposed for the synthesis of SWCNTs at a large-scale. [•] High-quality SWCNTs were produced due to the high temperature of the plasma. [•] Hydrogen plasma contributes to the purity enhancement by selective etching of amorphous carbon. [•] The in situ diameter control is demonstrated by adjusting the sulfur content in the feedstock. [Copyright &y& Elsevier]