This paper presents the variation of interface thermal resistance between two single-wall carbon nanotubes versus overlap length by using nonequilibrium molecular dynamics method. The simulation model is constructed through pulling the inner tube out a double wall carbon nanotube with a distance. The overlap length between the inner and outer nanotubes is proportional to the contact area, which acts as a variable in controlling the heat transport between the inner and the outer nanotubes. Simulation results show that the intertube thermal conductance increases almost linearly with increasing the overlap length. The rectification effect is undetectable due to the fixed atoms that prevent rotation of the carbon nanotubes and resulting in constant intertube coupling strength.

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