[16p-B309-1~20] 17.1 Carbon nanotubes & other nanocarbon materials

▲ [16p-B309-5] Assistive effects of carbon feedstock and etchant on defect healing of carbon nanotubes by thermal process

〇Man Shen¹, Mengyue Wang¹, Yuanjia Liu¹, Manaka Maekawa¹, Taiki Inoue¹, Yoshihiro Kobayashi¹ (1.Osaka Univ. Appl Phys)

Keywords:carbon nanotube, defect healing

Carbon nanotubes (CNTs) have attracted extensive research interest for their extremely unique thermal, electrical, and mechanical properties. Unfortunately, as-synthesized CNTs usually show significantly lower performances than expected due to the formation of defects and amorphous carbon (a-C). Past simulation research has shown that defects of CNTs can be thermally healed by a post-synthesis process and the supply of carbon feedstock such as acetylene (C₂H₂) is effective for healing vacancy defects. Etchant such as water or carbon dioxide (CO₂) was also widely used during the growth process of CNTs to remove a-C. In the present work, we studied defect healing of CNTs by post-synthesis process using C₂H₂, CO₂, and the combination of them.