High-conductivity carbon nanotube fibers via wet spinning of long carbon nanotubes

Japanese Journal of Applied Physics 2026

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Authors: Satoshi Yamazaki, Kazuki Sugihara, Ayaka NAMEKAWA, Yoko Iizumi, Daisuke Kimura, Kazufumi Kobashi, Takahiro Morimoto, Tsuyoshi Endo, Seiya Nishida, Shohei Chiashi A, Kai Ikoma, Takashi Kodama
+1 more Toshiya Okazaki
DOI: 10.35848/1347-4065/ae4665
Cited by: 0
References: 39

Abstract

Abstract Carbon nanotube (CNT) fibers are promising lightweight conductors, yet their electrical conductivity remains limited compared with metallic benchmarks. Here, we demonstrate the fabrication of highly aligned and densely packed CNT fibers by wet spinning CNTs with long effective lengths. Wet-spun fibers prepared from chlorosulfonic acid dispersions exhibit an as-spun conductivity of 11.4 MS m −1 . Subsequent doping with fuming nitric acid increases the conductivity to 15.9 MS m −1 , representing one of the highest values reported for wet-spun CNT fibers. These results establish effective nanotube length and high packing density as key design parameters for high-performance lightweight conductors.

Fields of Study & Subjects

Carbon Nanotubes in Composites Graphene research and applications Electromagnetic wave absorption materials

Publication details

Journal / source
Japanese Journal of Applied Physics
Volume
65
Issue
5
Pages
050901–050901
Publication date
16 February 2026
Language
EN