Thermal conductance and heat capacity measurement utilizing suspended-wire resistor

摘要

A method of measuring the thermal conductance and the heat capacity of a nanowire is presented. The nanowire is suspended in vacuum to ensure the thermal isolation, and the resistance is measured with respect to the square of the current to obtain the thermal conductance in the length direction. The heat capacity is evaluated by the frequency response of the 3f component of the voltage across the nanowire when it is driven by the AC current at f. This method is successfully applied to characterize a silicon nanowire by using a platinum wire resistor.