Stretchable Iontronic Pressure Sensor Array With Low Crosstalk and High Sensitivity for Epidermal Monitoring

作者：Weihao Zheng, Yunlong Zhao, Hongcheng Xu, Yangbo Yuan, Weidong Wang, Libo Gao · 发表于：IEEE Electron Device Letters · 年份：2023 · DOI：10.1109/led.2023.3240764 · 被引用次数：33 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Conducting polymers and applications、Tactile and Sensory Interactions

Soft piezocapacitive sensor, owing to its simple assembly and low power consumption, draws intensive interests for physiological monitoring. However, crosstalk between proximity sensing units and limited mechanically stretching suppressed its practical application for conventional capacitive sensor array. Here we report a stretchable iontronic pressure sensor (SIPS) array with low proximate crosstalk for epidermal monitoring. Benefiting from electric double layer (EDL) capacitance effect between robust aramid nanofiber (ANF) /MXene (Ti3C2Tx) composite electrode and ionic film, the SIPS exhibits a high sensitivity up to 521.69 kPa−1, low limit of detection (0.22 Pa), broad linear sensing range (200 kPa) and rapid response time (17 ms) as well as long-term stable working durability for 10,000 cycles. The serpentine island bridge structure enables the SIPS array to stretch up to 40%, allowing pulse and grip monitoring of a bent wrist and finger, respectively, through processing circuits. This demonstrates the promising application prospects in vital physiological monitoring.