Thermal defect healing of single-walled carbon nanotubes assisted by supplying carbon-containing reactants. (1st January 2023)

• Record Type: Journal Article
• Authors: Wang, Mengyue; Maekawa, Manaka; Shen, Man; Liu, Yuanjia; Arifuku, Michiharu; Kiyoyanagi, Noriko; Inoue, Taiki; Kobayashi, Yoshihiro
• Is Part Of: Applied physics express. Volume 16:Number 1(2023)
• Publication Date: 2023-01-01
• Subjects: single-walled carbon nanotubes -- defect healing -- crystallinity -- post-treatment -- C2H2; Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.35848/1882-0786/acaaec
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: We experimentally investigated the effect of carbon-containing reactants (C2 H2 ) on healing the defects in single-walled carbon nanotubes (SWCNTs) by thermal processes at high temperatures (∼1100 °C). Introducing C2 H2 notably improved the crystallinity of healed SWCNTs compared with the thermal process in Ar ambient without C2 H2 . The defect healing rate increased with increasing C2 H2 partial pressure, and the healing effect of C2 H2 was more remarkable for relatively thinner SWCNTs (<1.1 nm). Combined with the relevant theoretical work reported previously, we propose a healing model in which C2 H2 helps to heal the vacancy defects and increases the healing rate at high temperatures.