[7a-C11-1~12] 17.1 Carbon nanotubes & other nanocarbon materials

[7a-C11-5] Controlling wall-number and tube-diameter of carbon nanotubes for improvement of CNT yarn characteristics

〇(M2)Hirotaka Inoue¹, Takuma Hayashi¹, Masaki Hada¹, Takeshi Nishikawa¹, Yoshifumi Yamashita¹, Yasuhiko Hayashi¹ (1.Okayama Univ.)

Keywords:Carbon nanotube, Chemical vapor growth, CNT yarn

CNT yarn with better electrical conductivity and tensile strength can be made of the CNTs with fewer walls and smaller tube diameter. It is because, the CNT yarn is made of finer CNTs that has high density. Here, we studied the relationship between CNT-growth-conditions and the number of CNT walls or tube diameter. Results of transmission electron microscopy observation showed that, the temperature at the initial growth of CNTs is one of the important parameter to control the number of CNT walls and tube diameter.