Thermal Transport in an Individual Multi-Walled Carbon Nanotube Defected by Focused Ion Beam Irradiation

Abstract

We conducted measurements of the thermal resistance of individual multi-walled carbon nanotubes (MWNT) defected by focused ion beam (FIB) irradiation to investigate the effect of amorphization of ballistic thermal transport. Obtained results for three samples with many kinds of irradiated points show that the first irradiation gives the largest thermal resistance and the resistance added by each FIB irradiation decreases as the number of defects increases. This result suggests that the thermal transport in nanoscale material is not diffusive but the simple model does not hold, that the thermal conductivity is proportional to power-law of length.