[23a-E203-1~11] 17.1 Carbon nanotubes & other nanocarbon materials

[23a-E203-3] Effect of carrier gas on chemical states of Co catalyst during SWCNT growth: in situ XAFS analysis

〇Shusaku Karasawa¹, Daiki Yamamoto¹, Kamal Sharma², Takahiro Saida^1,2, Shigeya Naritsuka¹, Takahiro Maruyama^1,2 (1.Meijo Univ., 2.Meijo Nanomater. Res. Center)

Keywords:carbon nanotube, XAFS, CVD

By using Ar, Ar/H₂, and Ar/O₂, we investigated the effect of carrier gas on the chemical state of the Co catalyst during temperature rise and SWCNT growth. When Ar was used, most of Co was carbonized during growth, but the Co carbide ratio decreased gradually for Ar/O₂ and Ar/H₂. For Ar/H₂, Co became metallic during SWCNT growth. SWCNT yield became the maximum, when Ar/O₂ was used as a carrier gas.