He Chenying, Wu Lie, Gu Guoqiang, Wei Lei, Yang Chunlei, Chen Ming
Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, People's Republic of China.
University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
Nano Lett. 2024 Jun 12;24(23):7040-7047. doi: 10.1021/acs.nanolett.4c01506. Epub 2024 May 28.
Flexible pressure sensors with a broad range and high sensitivity are greatly desired yet challenging to build. Herein, we have successfully fabricated a pressure-temperature dual sensor via an ionic assisted charge enhancement strategy. Benefiting from the immobilization effect for [EMIM] [TFSI] ion pairs and charge transfer between ionic liquid (IL) and HFMO (HFeMoO), the formed IL-HFMO-TPU pressure sensor shows a high sensitivity of 25.35 kPa and broad sensing range (∼10 MPa), respectively. Furthermore, the sensor device exhibits high durability and stability (5000 cycles@1 MPa). The IL-HFMO-TPU sensor also shows the merit of good temperature sensing properties. Attributed to these superior properties, the proposed sensor device could detect pressure in an ultrawide sensing range (from Pa to MPa), including breathe and biophysical signal monitoring etc. The proposed ionic assisted enhancement approach is a generic strategy for constructing high performance flexible pressure-temperature dual sensor.
具有宽范围和高灵敏度的柔性压力传感器备受期待，但制造起来颇具挑战。在此，我们通过离子辅助电荷增强策略成功制备了一种压力 - 温度双传感器。受益于[EMIM][TFSI]离子对的固定化效应以及离子液体（IL）与HFMO（HFeMoO）之间的电荷转移，所形成的IL - HFMO - TPU压力传感器分别显示出25.35 kPa的高灵敏度和宽传感范围（约10 MPa）。此外，该传感器器件具有高耐久性和稳定性（1 MPa下5000次循环）。IL - HFMO - TPU传感器还展现出良好的温度传感特性。基于这些优异性能，所提出的传感器器件能够在超宽传感范围（从帕斯卡到兆帕斯卡）内检测压力，包括呼吸和生物物理信号监测等。所提出的离子辅助增强方法是构建高性能柔性压力 - 温度双传感器的通用策略。
