Elongation and resistance change of carbon nanotube filaments formed by gas discharge breakdown

• Published in: Japanese Journal of Applied Physics Vol. 58; no. SA; p. SAAE05
• Main Authors: Funaki, Seiji, Mizushima, Yuuki, Sato, Hideki
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.02.2019
• ISSN: 0021-4922; 1347-4065
• DOI: 10.7567/1347-4065/aaec12

Gas discharge breakdown generated between a pair of electrodes, one of which is covered by carbon nanotubes (CNTs) gives formation of CNT filaments, comprising many short bundles of CNTs and bridging the two electrodes. This phenomenon may provide a suitable method for spinning CNTs. Here, we examined the influence of lengths of the CNTs used for CNT filament formation on efficiency of the filament formation between the electrodes and on elongation length of the filaments that was carried out by increase of the interelectrode distance. The results showed that shorter (19 m) CNTs gave higher efficiency on the filament formation and longer elongation lengths of the filaments than longer (161 and 328 m) CNTs. Measurements of electrical resistance of the CNT filaments showed that the resistance of single CNT filament is of the order of 100 M . The results also showed that the tunneling conduction dominates the resistance of the filaments comprising the shorter CNTs.