Flexible Copper-Based Thermistors Fabricated by Laser Direct Writing for Low-Temperature Sensing
Zilong Peng, Wei Guo, Tong Liu, Xuewei Wang, Daozhi Shen, Ying Zhu, Xingwen Zhou, Jianfeng Yan, Hongqiang Zhang
Abstract
With the flexibilization tendency of traditional electronics, developing sensing devices for the low-temperature field is demanding. Here, we fabricated a flexible copper-based thermistor by a laser direct writing process with Cu ion precursors. The copper-based thermistor performs with excellent temperature sensing ability and high stability under different environments. We discussed the effect of laser power on the temperature sensitivity of the copper-based thermistor, explained the sensing mechanism of the as-written copper-based films, and fabricated a temperature sensor array for realizing temperature management in a specific zone. All of the investigations have demonstrated that such copper-based thermistors can be used as candidate devices for low-temperature sensing fields.