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