Jing Weijie, Yang Chao, Wu Yin, Zhao Qiang, Chen Li, Li Gang
Key Laboratory of Optoelectronic Technology and Systems, Ministry of Education, Defense Key Disciplines Lab of Novel Micro-Nano Devices and System Technology, Chongqing University, Chongqing 400044, People's Republic of China.
Nanotechnology. 2020 Oct 23;31(43):435501. doi: 10.1088/1361-6528/aba3db. Epub 2020 Jul 8.
Cost-effective and broad-range flexible pressure sensors are highly desirable for use in wearable electronic devices for a wide range of sensitive measurements, from pulse to dynamic human motion. Herein, we present a high-performance flexible pressure sensor based on carbon nanotube-coated elastomer micropillar arrays (EMPAs). The EMPAs are prepared using a facile magnetic-field-induced self-assembly technique, which provides a simple and low-cost strategy to fabricate microstructured elastomers for constructing high-performance pressure sensors. Since high-ratio microstructured elastomers are employed as the sensing materials, our pressure sensors show a superior pressure-sensing performance, with a high sensitivity of 0.497 kPa in the low-pressure regime of <100 Pa, a broad sensing range from a few pascals up to 80 kPa, and a fast response time of <0.2 s. Finally, we demonstrate that the sensor can be used to not only detect human arthrosis movements, but also to monitor subtle human physiological activities.
经济高效且具有广泛适用性的柔性压力传感器在可穿戴电子设备中非常受欢迎，可用于从脉搏到动态人体运动等广泛的敏感测量。在此，我们展示了一种基于碳纳米管涂层弹性体微柱阵列（EMPA）的高性能柔性压力传感器。EMPA采用简便的磁场诱导自组装技术制备，该技术为制造用于构建高性能压力传感器的微结构弹性体提供了一种简单且低成本的策略。由于采用了高比例的微结构弹性体作为传感材料，我们的压力传感器表现出卓越的压力传感性能，在低于100 Pa的低压范围内具有0.497 kPa的高灵敏度，传感范围从几帕斯卡到80 kPa很宽，响应时间小于0.2 s。最后，我们证明该传感器不仅可用于检测人体关节运动，还可用于监测人体微妙的生理活动。
