Compressible and Stretchable Magnetoelectric Sensors Based on Liquid Metals for Highly Sensitive, Self-Powered Respiratory Monitoring,ACS Applied Materials & Interfaces

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Compressible and Stretchable Magnetoelectric Sensors Based on Liquid Metals for Highly Sensitive, Self-Powered Respiratory Monitoring
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-03-29 , DOI: 10.1021/acsami.1c04457
Xuan Zhang _{1,

2} , Jingwei Ai ₃ , Ruiping Zou ₂ , Bin Su ₁

Affiliation

Healthcare monitoring, especially for respiration, has attracted tremendous attention from academics considering the great significance of health information feedback. The respiratory rate, as a critical health indicator, has been used to screen and evaluate potential illness risks in early medical diagnoses. A self-powered sensing system for medical monitoring is critical and imperative due to needless battery replacement and simple assembly. However, the development of a self-powered respiratory sensor with highly sensitive performance is still a daunting challenge. In this work, a compressible and stretchable magnetoelectric sensor (CSMS) with an arch-shaped air gap is reported, enabling self-powered respiratory monitoring driven by exhaled/inhaled breath. The CSMS contains two key functional materials: liquid metals and magnetic powders both with low Young’s modulus, allowing for sensing compressibility and stretchability simultaneously. More importantly, such a magnetoelectric sensor exhibits mechanoelectrical converting capacity under an external force, which has been verified by Maxwell numerical simulation. Owing to the air-layer introduction, the magnetoelectric sensors achieve high sensitivity (up to 17.73 kPa^–1), fast response, and long-term stability. The highly sensitive and self-powered magnetoelectric sensor can be further applied as a noninvasive, miniaturized, and portable respiratory monitoring system with the aim of warning for potential health risks. We anticipate that this technique will create an avenue for self-powered respiratory monitoring fields.

中文翻译：

基于液态金属的可压缩和可拉伸磁电传感器，用于高度灵敏的自供电式呼吸监测

考虑到健康信息反馈的巨大意义，医疗保健监测，尤其是呼吸监测，已经引起了学术界的极大关注。呼吸频率作为一种重要的健康指标，已被用于筛查和评估早期医学诊断中的潜在疾病风险。由于无需更换电池且组装简单，因此用于医疗监控的自供电传感系统至关重要且势在必行。然而，开发具有高度灵敏性能的自供电呼吸传感器仍然是艰巨的挑战。在这项工作中，报告了一种具有弓形气隙的可压缩且可伸展的磁电传感器（CSMS），可以通过呼气/吸气驱动进行自供电式呼吸监测。CSMS包含两个关键功能材料：液体金属和磁性粉末均具有低的杨氏模量，从而可同时检测可压缩性和可拉伸性。更重要的是，这种磁电传感器在外力作用下表现出机电转换能力，这已经通过麦克斯韦数值模拟得到了验证。由于引入了空气层，磁电传感器实现了高灵敏度（高达17.73 kPa^–1），快速响应和长期稳定性。高灵敏度，自供电的磁电传感器可以进一步用作无创，小型化和便携式呼吸监测系统，以警告潜在的健康风险。我们预计该技术将为自供电的呼吸监测领域创造一条途径。

更新日期：2021-04-08

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