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Stretchable Piezoelectric Sensing Systems for Self-powered and Wireless Health Monitoring

Research output: Contribution to journalArticle

Original languageEnglish
JournalAdvanced Materials Technologies
DateAccepted/In press - 11 Feb 2019

Abstract

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, we introduce a kirigami approach to realize a novel stretchable strain sensor 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. We enhance the power output from the mechano-electric piezoelectric sensing effect by introducing an inter-segment, through-plane, electrode pattern. By additionally integrating wireless electronics, this sensing network can work in an entirely battery-free mode. We demonstrate the kirigami stretchable piezoelectric sensor in cardiac monitoring and wearable body tracking applications. The integrated soft, stretchable, and biocompatible sensor demonstrates excellent in vitro and ex vivo performances and provide insights for the potential use in myriad biomedical and wearable health monitoring applications.

    Structured keywords

  • Bristol Composites Institute ACCIS

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