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Microstructured capacitive sensor with broad detection range and long-term stability for human activity detection
npj Flexible Electronics ( IF 14.6 ) Pub Date : 2021-07-22 , DOI: 10.1038/s41528-021-00114-y
Xin He 1 , Zhihao Liu 1, 2 , Gengzhe Shen 1, 3 , Xiang He 1 , Jionghong Liang 1 , Yu Zhong 1 , Tianlong Liang 1 , Jie He 1 , Yue Xin 1 , Chi Zhang 1 , Guofa Cai 2 , Dongdong Ye 4
Affiliation  

In recent years, flexible stress sensors capable of monitoring diverse body movements and physiological signals have been attracting great attention in the fields of healthcare systems, human–machine interfaces, and wearable electronics. Inspired by the structure of natural eggshell inner membrane (ESIM), we developed a pressure sensor based on MXene (Ti3C2Tx)/Ag NWs (silver nanowires) composite electrodes and the micro-structured dielectric layer to meet the application requirements of wide detection range and long-term stability for the sensors. In the light of the nanoscale-microarray of the dielectric layer and the rough surface of electrode materials, this pressure sensor is expected to allow great and persistent deformation during the loading process. As a result, the device is characterized by an improved sensitivity, fast response (in the millisecond range), wide detection range (0–600 kPa), and long-term stability. The outstanding performance of the proposed sensor makes it possible to detect various human activities, such as speaking, air blowing, clenching, walking, finger/knee/elbow bending, and striking, demonstrating its good application prospects in wearable and flexible electronic devices.



中文翻译:

具有广泛检测范围和长期稳定性的微结构电容传感器,用于人体活动检测

近年来,能够监测各种身体运动和生理信号的柔性压力传感器在医疗保健系统、人机界面和可穿戴电子领域引起了极大的关注。受天然蛋壳内膜 (ESIM) 结构的启发,我们开发了一种基于 MXene (Ti 3 C 2 T x)/Ag NWs(银纳米线)复合电极和微结构介电层,满足传感器宽检测范围和长期稳定性的应用需求。鉴于介电层的纳米级微阵列和电极材料的粗糙表面,该压力传感器有望在加载过程中允许巨大且持续的变形。因此,该设备的特点是灵敏度提高、响应速度快(毫秒范围内)、检测范围宽(0-600 kPa)和长期稳定性。所提出的传感器的出色性能使其能够检测各种人类活动,例如说话、吹气、握紧、走路、手指/膝盖/肘部弯曲和打击,

更新日期:2021-07-22
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