[23p-P11-1~25] 17 Nanocarbon Technology(Poster)

[23p-P11-3] Preparation of n-type single-walled carbon nanotube using organic boron compounds

〇(M1)Aoi Hamasuna¹, Naoki Tanaka^1,2, Tsuyohiko Fujigaya^1,2,3 (1.Grad. Sch. of Eng., Kyushu Univ., 2.WPI-I2CNER, 3.Ctr. for Molecular System, Kyushu Univ.)

Keywords:carbon nanotube, thermoelectric generation, n-type doping

Single-walled carbon nanotubes (SWCNTs) are promising materials for thermoelectric devices because of their remarkable electrical conductivity, flexibility and light weight. For efficient thermoelectric generation, both p-type and n-type thermoelectric materials are required. However, SWCNTs act as p-type semiconductors owing to the hole doping by water and oxygen in the air. Therefore, many efforts to develop n-type SWCNTs have been performed mainly by chemical doping using electron donors. Recently, our group reported that boryl radicals generated by boron-boron bond scission of diboron can act as electron-dopant of SWCNTs. However, the n-doped SWCNTs did not show long-term air stability. In this study, we used tetrahydroxydiboron in place of bis(pinacolate)diboron as the boron source to study the effect of the chemical structure of the boron to the n-doped air-stability.