Stretchable Piezoelectric Sensing Systems for Self-Powered and Wireless Health Monitoring
Stretchable Piezoelectric Sensing Systems for Self-Powered and Wireless Health Monitoring
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DOI：
10.1002/admt.201900100
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发表时间：
2019-05-01
影响因子：
6.8
通讯作者：
Rossiter, Jonathan
中科院分区：
文献类型：
--
作者：
Sun, Rujie;Carreira, Sara Correia;Rossiter, Jonathan
持续监测人体生理信号对于通过早期发现健康障碍来管理个人保健至关重要。可穿戴设备和植入式设备显示出实时记录生理状况和身体运动的巨大潜力，因此越来越受到关注。传统的压电传感器具有潜在的自供电优势，但由于其固有的缺乏拉伸性而存在局限性。本文提出了一种新型可拉伸应变传感器的kirigami方法，该方法通过压电薄膜上的切割图案网络来实现，利用图案引起的各向异性和局部弯曲。所产生的图案同时增强了薄膜的电气性能和拉伸性，同时保留了底层材料的机械完整性。通过引入段间、通平面、电极模式，增强了机电压电传感效应的功率输出。通过额外集成无线电子设备，该传感网络可以在完全无电池模式下工作。kirigami可拉伸压电传感器在心脏监测和可穿戴身体跟踪应用中得到了验证。集成的柔软、可拉伸和生物相容性传感器在体外和离体中表现出出色的性能，并为无数生物医学和可穿戴健康监测应用的潜在用途提供了见解。
Continuous monitoring of human physiological signals is critical to managing personal healthcare by early detection of health disorders. Wearable and implantable devices are attracting growing attention as they show great potential for real-time recording of physiological conditions and body motions. Conventional piezoelectric sensors have the advantage of potentially being self-powered, but have limitations due to their intrinsic lack of stretchability. Herein, a kirigami approach to realize a novel stretchable strain sensor is introduced through a network of cut patterns in a piezoelectric thin film, exploiting the anisotropic and local bending that the patterns induce. The resulting pattern simultaneously enhances the electrical performance of the film and its stretchability while retaining the mechanical integrity of the underlying materials. The power output is enhanced from the mechanoelectric piezoelectric sensing effect by introducing an intersegment, through-plane, electrode pattern. By additionally integrating wireless electronics, this sensing network could work in an entirely battery-free mode. The kirigami stretchable piezoelectric sensor is demonstrated in cardiac monitoring and wearable body tracking applications. The integrated soft, stretchable, and biocompatible sensor demonstrates excellent in vitro and ex vivo performances and provides insights for the potential use in myriad biomedical and wearable health monitoring applications.