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Flexible Piezoresistive Sensors based on Conducting Polymer-coated Fabric Applied to Human Physiological Signals Monitoring

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Abstract

This paper describes a flexible pressure sensor based on polypyrrole(PPy)-Cotton composites, in which PPy is grown on cellulose fibers of cotton pads via an in situ vapor growth method, which is beneficial to the homogeneity of the composites. The resulting devices exhibits rapid response and recovery speed, the response and recovery times are 220 ms and 240 ms, respectively. The optimal PPy-Cotton Pads (PCPs) sensor shows low detection limit, which is about 50 Pa. At the same time, it exhibits excellent durability in the measurement of repeated loading-unloading pressure over 1000 cycles. The resultant sensor can be attached on different positions of body and applied to recording physiological signals, such as wrist pulse, vocal cord vibration, respiration and eyes blinking. Finally, a 4 × 4 pressure sensor array shows that the PCPs sensor has capability in pressure distribution detection and represents great potential in the fields of wearable electronics and biomedical devices.

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Acknowledgments

This study was supported by the National Natural Science Foundation of China (Nos. 61773178 and 61671218), the Natural Science Foundation Committee (NSFC, Nos. 61674066 and 61903150), the China Postdoctoral Science Foundation (No. 801191010412).

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Authors and Affiliations

  1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China

    Xiuzhu Lin, Tong Zhang, Junhou Cao, Han Wen, Teng Fei, Sen Liu, Rui Wang & Hongran Zhao

  2. State Key Laboratory of Transducer Technology, Shanghai, 200050, China

    Teng Fei

  3. Department of Food Science and Engineering, College of Food Science and Engineering, Jilin University, Changchun, 130062, China

    Hui Ren

Authors
  1. Xiuzhu Lin
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  2. Tong Zhang
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  3. Junhou Cao
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  4. Han Wen
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  5. Teng Fei
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  6. Sen Liu
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  7. Rui Wang
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  8. Hui Ren
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  9. Hongran Zhao
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Correspondence to Hui Ren or Hongran Zhao.

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Lin, X., Zhang, T., Cao, J. et al. Flexible Piezoresistive Sensors based on Conducting Polymer-coated Fabric Applied to Human Physiological Signals Monitoring. J Bionic Eng 17, 55–63 (2020). https://doi.org/10.1007/s42235-020-0004-9

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  • DOI: https://doi.org/10.1007/s42235-020-0004-9

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