Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 13, Pages 15727-15737Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c04457
Keywords
compressible and stretchable magnetoelectric sensor (CSMS); liquid metals; high-sensitive; self-powered; respiratory monitoring
Funding
- National 1000 Young Talents Program of China
- HUST
- Foundation of Shenzhen Science and Technology Innovation Committee [JCYJ20190809102407410]
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A self-powered compressible and stretchable magnetoelectric sensor for respiratory monitoring has been developed, demonstrating high sensitivity, fast response, and long-term stability. This sensor can be used for noninvasive, miniaturized, and portable respiratory monitoring, aiming to warn for potential health risks.
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.
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