熱変形を伴う銀ナノワイヤに関するTRI法を用いた温度計測の高精度化

抄録

To evaluate the characteristic of Joule heating and heat transfer of the network consisted of Ag nanowires (Ag-NWs), we measured the temperature distribution of Ag-NWs randomly dispersed on a glass substrate using the thermoreflectance imaging (TRI) method. The TRI method measures the surface temperature by measuring the change of the reflectance distribution captured by the camera. The measurement accuracy relies significantly on the accuracy of the light intensity measurement and the alignment of the wires among the images. Therefore, the thermal deformation of Ag-NW is an essential issue for the measurement. To solve this problem, we introduced the algorithm extracting the light intensity at the centerline of Ag-NWs in this study, and evaluated the measurement accuracy and confirmed that it can be improved even for small deformation on the order of sub-nanometers.