Experimental Study on Interfacial Thermal Transport of Multi-Walled Carbon Nanotube

Interfacial thermal transport of multi-walled carbon nanotube is explored by using T-type sensor. Reliable signals of heat flow through an individual nanotube were obtained. Estimated thermal boundary resistances between the end of CNT and solid surfaces do not show the clear dependency on material that has been predicted by the diffuse mismatch model treating graphite. This discrepancy is mainly due to the weak van der Waals force at the contact. The heat transfer coefficients of nanotube in gases were also measured by applying the T-type sensor and fin theory. Obtained results show good agreement with the kinetic theory for various gases but a large deviation was found for low pressure regime. Key-Words: Carbon Nanotube, Thermal Conductivity, Thermal Contact Resistance, Defect, Hot-Film Sensor, MEMS, HRTEM