基于无铅压电纳米纤维的柔性自发电眨眼和眼球转动传感器（英文）-Science China(Materials)2024年12期-手机知网

基于无铅压电纳米纤维的柔性自发电眨眼和眼球转动传感器（英文）

Hubei Key Laboratory of Micro & Nano Electric Materials and Devices, School of Microelectronics, Hubei University;Key Laboratory of Intelligent Sensing System and Security, Ministry of Education, Hubei University;School of Chemistry and Environmental Engineering, Wuhan University of Bioengineering | 姜蕾梅旭邵婷婷杨欣然龙午阳万美琳范怡静熊娟张翔晖胡永明顾豪爽王钊

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铌酸钾钠(KNN)基纳米纤维兼具高压电响应、柔性和生物相容性,在电子皮肤和可穿戴器件等领域具有巨大的应用潜力,但其有限的压电性能制约了其检测眨眼、眼球转动等微小人体运动的灵敏度.本文采用静电纺丝法制备了Li和Ta掺杂的KNN纳米纤维.对A位和B位的Li、Ta共掺杂引起了晶格畸变和正交(O)-四方(T)相变,显著增强了材料的压电响应,其平均压电常数d33*达到110.7 pm/V.得益于掺杂KNN纳米纤维的优异压电响应,将其进行PDMS封装所得的柔性自供电传感器表现出良好的压力传感灵敏度(0.3365 V/(N cm~2)).将该传感器简单贴敷于太阳穴附近,可检测因眨眼动作而造成的微小皮肤形变,可用于识别因精神疲劳或用眼过度而造成的异常眨眼行为.该器件还可实现实时、连续和非侵入性地眼球跟踪功能,在人机交互和人工智能等领域显示出应用潜力.

机　构:

Hubei Key Laboratory of Micro & Nano Electric Materials and Devices, School of Microelectronics, Hubei University；Key Laboratory of Intelligent Sensing System and Security, Ministry of Education, Hubei University；School of Chemistry and Environmental Engineering, Wuhan University of Bioengineering；

领　域:

有机化工；材料科学；自动化技术；

关键词:

flexible sensors；eye movement sensing；piezoelectric nanofibers；potassium sodium niobate；electrospinning；

格　式:

PDF原版；EPUB自适应版(需下载客户端)

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