Presentation Information
[10p-E207-11]Fabrication of Single-Wall Carbon Nanotube Fibers via a Film-to-Fiber Method and Characterization of Their Thermal and Electrical Properties
〇(DC)Shigeki Saito1, Jiun-Hung Yi2, Aosheen Anand2, Hajime Kioi2, Kyota Oyanagi1, Xuqiang Xu3, Simon Wald3, Satoshi Kusaba1, Jana Zaumseil3, Matteo Pasquali2, Geoff Wehmeyer2, Junichiro Kono2, Kazuhiro Yanagi1 (1.TMU, 2.Rice Univ., 3.Heidelberg Univ.)
Keywords:
single-wall carbon nanotube fiber,Thermal and charge transport,semiconducting fiber
Carbon nanotube (CNT) fibers are macroscopic assemblies with high electrical and thermal transport properties. However, most reported CNT fibers are made from multi-wall CNTs, making it difficult to clarify properties from individual nanotubes. In this work, we developed a film-to-fiber method to fabricate single-wall carbon nanotube (SWCNT) fibers from SWCNT thin films. Because the precursor films can be prepared from sorted and aligned SWCNTs, this method controls microscopic structures, such as chirality, and macroscopic fiber alignment. To clarify the alignment effect, we fabricated two fibers: one with SWCNTs aligned parallel to the fiber axis and the other with SWCNTs aligned perpendicular to it. Transport properties were evaluated using the T-junction and four-probe methods. Thermal conductivity was 125 ± 96 Wm−1K−1 for parallel fibers and 28 ± 17 Wm−1K−1 for perpendicular fibers, showing anisotropic heat transport. Electrical conductivity also depended on alignment.