Temperature and Joule Heating Measurements of Nano-wire Network using Two-dimensional Thermoreflectance Imaging Method

Abstract

In this study, we measured the temperature distributions of Ag nano-wire network, which consists of nano-wire with diameter of 100nm and length of 100m, when a constant current was supplied using two-dimensional thermoreflectance imaging method. The temperature of the nanowires increased as the applied current increased. However, the temperature distribution was not uniform and a variation was observed. We believe that this was attributed to the electric resistance variation caused by the nano-wire number density difference and the contact condition between the nano-wires. Weibull distribution was applied to the frequency distribution of the temperature difference from the base value for each applied current. The scale and shape parameters were evaluated to discuss the effects of the current on the Joule heating and heat transfer characteristics of the nano-wire network.