Flexible Temperature Sensor with Wide Sensing Range and Fast Response Enabled by PEDOT:PSS/CNT and Thermal Management Encapsulation

作者：Yuewen Zhang, Jie Jin, Yong Zhang, Deqing Mei, Yancheng Wang · 发表于：ACS Applied Electronic Materials · 年份：2025 · 被引用次数：14 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Gas Sensing Nanomaterials and Sensors、Advanced Thermoelectric Materials and Devices

Flexible temperature sensors have attracted widespread attention due to their potential in diverse applications, including medical health, intelligent robots, and industrial production. However, most flexible temperature sensors work in a narrow temperature range and exhibit relatively long response times. Herein, we present a flexible temperature sensor with a wide sensing range and fast response characteristics. The PEDOT:PSS/CNT-based sensitive material exhibits excellent rheological and sensing properties, enabling wide-range temperature sensing and fabrication through a simple screen-printing process. To achieve a fast response, an innovative thermal management method that combines the thermal conductive layer and the thermal insulation layer on both sides of the sensing layer is employed. The thermally conductive composite PDMS/flake graphite and thermal insulation composite PDMS/hollow glass microsphere are formulated to offer satisfactory thermal and mechanical properties. As a result, the developed sensor possesses a wide sensing range of −30 to 90 °C, a high linearity of 0.996, and a fast response to temperature. The sensor also demonstrates excellent stability, including low hysteresis (4.7%), high repeatability (1000 cycles), long operational lifespan (90 days), and resistance to pressure and bending. Application experiments of robotic object grasping and human respiratory monitoring show that the sensor can accurately measure the temperatures of various objects a...