arc-discharge method hydrogen arc-discharge method hydrogen direct-current arc-discharge method CHMO:0002241 A method for the synthesis of carbon nanotubes where a direct-current arc voltage is applied across two graphite electrodes immersed in H2 gas. When pure graphite rods are used, fullerenes are deposited as soot inside the chamber, and multi-walled carbon nanotubes are deposited on the cathode. When a graphite anode containing a metal catalyst (Fe or Co) is used with a pure graphite cathode single-walled carbon nanotubes are generated in the form of soot. hydrogen direct current arc-discharge method H2 dc arc-discharge method https://orcid.org/0000-0001-5985-7429 H2 arc discharge method hydrogen arc discharge method hydrogen direct-current arc discharge 2009-08-04T05:24:50Z