Thermal conductivity of vertically-aligned single-walled carbon nanotube film measured by 3$\omega$ method

Single-walled carbon nanotubes (SWNTs) have been expected to have extremely high thermal conductivity. However, the previously reported modeling and experimental works using individual SWNTs are too idealistic for the vertically-aligned single-walled carbon nanotube (VA-SWNT) film, in terms of defects, bundling effects, etc. In this work, we measured thermal conductivity of high purity VA-SWNT film synthesized by alcohol catalytic chemical vapor deposition (ACCVD) method [1]. We utilize thin film 3$\omega$ method for measuring thermal properties by depositing metal directly onto the VA- SWNT film. In the course of probing the intrinsic thermal conductivity, we discuss the effect of thermal boundary resistances at the nanotube-metal and nanotube-susbstrate boundaries. [1] Y. Murakami et al., Chem. Phys. Lett., 385 (2004), 298.