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Hybrid electromechanical properties of hetero-doped and homogeneously bonded dual-mode pressure sensor for indoor body area network node

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Abstract

Pressure sensors are considerably important for continuous monitoring of human movement and the surrounding environment to construct a caregiving system for the elderly living alone. The challenge for pressure sensors that still remains is combining self-driven, comfort, and multifunctionalization. Herein, an all-in-one conformal pressure sensor (ACPS) based on a homogeneous integrated triboelectric-piezoelectric hybrid sensor is proposed. The ACPS has dual-mode sensing properties due to coupling triboelectrification and piezoelectric effect ensuring a stable response to various external stimulations. Silver-coated glass microspheres and polyacrylonitrile were uniformly filleted into the silicone rubber substrate using a hetero-doping method to create a stretchable electrode layer with flexible conformal characteristics and a piezoelectric layer with excellent piezoelectric properties, respectively. Meanwhile, the triboelectric layer was fabricated using the same silicone rubber, allowing ACPS to be homogeneously bonded into an all-in-one structure with reliable durability. This allowed various functional layers to have outstanding interface characteristics and thus improve the electrical transmission effect. The developed ACPS had outstanding sensitivity (1.04 V/104 Pa), high linearity (about 0.984), a wide measurement range (10–700 kPa), and can accurately and continuously distinguish multiple movements. Furthermore, using a homemade signal processing circuit, ACPSs can be deployed in the human body and the room as indoor body area network nodes. When successfully applied to the remote tracking of daily dynamic home life and the remote operation of small electrical equipment, these ACPSs can achieve real-time caregiving for the elderly living alone. As an application area desperately needed by society, this study envisions a caregiving system for the elderly living alone without violating personal privacy.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant Nos. 62101513, 62171414, 52175554, 51975542), Fundamental Research Program of Shanxi Province (Grant Nos. 201901D111146, 20210302124170), China Postdoctoral Science Foundation (Grant Nos. 2022TQ0230, 2022M712324), Shanxi “1331 Project” Key Subject Construction (Grant No. 1331KSC), and Young Academic Leaders Project of North University of China (Grant No. 11045501).

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  1. These authors contributed equally to this work.

Authors and Affiliations

  1. Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan, 030051, China

    Junbin Yu, Shuai Xian, Min Wang, Yin Wang, Xiaojuan Hou, Le Zhang, Jian He, Jiliang Mu & Xiujian Chou

  2. Sichuan Aerospace Fenghuo Servo Control Technology Corporation, Chengdu, 610000, China

    Jinbiao Mu

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  1. Junbin Yu
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  2. Shuai Xian
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Correspondence to Jiliang Mu.

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Supporting information Figures S1–S8 and Videos S1–S5. The supporting information is available online at https://info.scichina.com and https://link.springer.com. The supporting materials are published as submitted, without typesetting or editing. The responsibility for scientific accuracy and content remains entirely with the authors. The supporting information is available online at info.scichina.com and link.springer.com. The supporting materials are published as submitted, without typesetting or editing. The responsibility for scientific accuracy and content remains entirely with the authors.

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Yu, J., Xian, S., Mu, J. et al. Hybrid electromechanical properties of hetero-doped and homogeneously bonded dual-mode pressure sensor for indoor body area network node. Sci. China Inf. Sci. 67, 112401 (2024). https://doi.org/10.1007/s11432-023-3801-1

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  • DOI: https://doi.org/10.1007/s11432-023-3801-1

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