Flexible and self-powered blinking and eyeball movements sensing based on electrospun lead-free piezoelectric nanofibers

IF 6.8 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2024-10-17 DOI:10.1007/s40843-024-3115-x

Lei Jiang (, ), Xu Mei (, ), Tingting Shao (, ), Xinran Yang (, ), Wuyang Long (, ), Meilin Wan (, ), Yijing Fan (, ), Juan Xiong (, ), Xianghui Zhang (, ), Yongming Hu (, ), Haoshuang Gu (, ), Zhao Wang (, )

{"title":"Flexible and self-powered blinking and eyeball movements sensing based on electrospun lead-free piezoelectric nanofibers","authors":"Lei Jiang \n (, ), Xu Mei \n (, ), Tingting Shao \n (, ), Xinran Yang \n (, ), Wuyang Long \n (, ), Meilin Wan \n (, ), Yijing Fan \n (, ), Juan Xiong \n (, ), Xianghui Zhang \n (, ), Yongming Hu \n (, ), Haoshuang Gu \n (, ), Zhao Wang \n (, )","doi":"10.1007/s40843-024-3115-x","DOIUrl":null,"url":null,"abstract":"<div><p>Potassium sodium niobate (KNN)-based nanofibers could combine piezoelectric properties with exceptional flexibility and biocompatibility, making them highly promising for flexible sensors in electronic skin and wearable applications. However, the suboptimal piezoelectric performance limits their sensitivity in detecting minute human body motions, such as blinking and eye movements. Herein, Li and Ta-doped KNN nanofibers were fabricated via an electro-spinning process. Co-doping with 6% Li at the A-site and 30% Ta at the B-site induces lattice distortion and an orthorhombic (O) to tetragonal (T) phase transition in the electrospun nanofibers, resulting in a significantly enhanced piezoelectric response, with an average <i>d</i><sub>33</sub>* value reaching 110.7 pm/V. The outstanding piezoelectric response gives rise to a remarkable sensitivity (0.3365 V/(N cm<sup>2</sup>)) in a self-powered flexible pressure sensor based on the doped KNN nanofibers, encapsulated in a polydimethylsiloxane matrix. The sensors, when attached to the temple regions, can detect tiny facial motions induced by blinking, enabling the distinction of abnormal blinking patterns associated with mental fatigue and excessive eye use. Additionally, they support real-time, continuous, and unobtrusive eyeball tracking, highlighting their potential as critical components in human-computer interaction and artificial intelligence applications.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"67 12","pages":"3948 - 3955"},"PeriodicalIF":6.8000,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science China Materials","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s40843-024-3115-x","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Potassium sodium niobate (KNN)-based nanofibers could combine piezoelectric properties with exceptional flexibility and biocompatibility, making them highly promising for flexible sensors in electronic skin and wearable applications. However, the suboptimal piezoelectric performance limits their sensitivity in detecting minute human body motions, such as blinking and eye movements. Herein, Li and Ta-doped KNN nanofibers were fabricated via an electro-spinning process. Co-doping with 6% Li at the A-site and 30% Ta at the B-site induces lattice distortion and an orthorhombic (O) to tetragonal (T) phase transition in the electrospun nanofibers, resulting in a significantly enhanced piezoelectric response, with an average d₃₃* value reaching 110.7 pm/V. The outstanding piezoelectric response gives rise to a remarkable sensitivity (0.3365 V/(N cm²)) in a self-powered flexible pressure sensor based on the doped KNN nanofibers, encapsulated in a polydimethylsiloxane matrix. The sensors, when attached to the temple regions, can detect tiny facial motions induced by blinking, enabling the distinction of abnormal blinking patterns associated with mental fatigue and excessive eye use. Additionally, they support real-time, continuous, and unobtrusive eyeball tracking, highlighting their potential as critical components in human-computer interaction and artificial intelligence applications.

查看原文本刊更多论文

基于电纺无铅压电纳米纤维的灵活自供电眨眼和眼球运动传感技术

基于铌酸钠钾（KNN）的纳米纤维可将压电特性与优异的柔韧性和生物相容性结合起来，因此极有希望成为电子皮肤和可穿戴应用中的柔性传感器。然而，不理想的压电性能限制了它们检测人体微小运动（如眨眼和眼球运动）的灵敏度。本文通过电纺丝工艺制作了掺杂锂和钽的 KNN 纳米纤维。在 A 位掺入 6% 的 Li 和在 B 位掺入 30% 的 Ta 会导致电纺纳米纤维的晶格畸变和正交（O）到四方（T）的相变，从而显著增强压电响应，平均 d33* 值达到 110.7 pm/V。出色的压电响应使基于掺杂 KNN 纳米纤维、封装在聚二甲基硅氧烷基质中的自供电柔性压力传感器具有出色的灵敏度（0.3365 V/(N cm2)）。传感器贴在太阳穴部位时，可以检测到眨眼引起的微小面部运动，从而区分与精神疲劳和用眼过度有关的异常眨眼模式。此外，这些传感器还支持实时、连续和不显眼的眼球跟踪，凸显了它们作为人机交互和人工智能应用关键组件的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.