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Ultra-conformal skin electrodes with synergistically enhanced conductivity for long-time and low-motion artifact epidermal electrophysiology

Author

Listed:
  • Yan Zhao

    (Beijing Normal University)

  • Song Zhang

    (The University of Southern Mississippi, Center for Optoelectronic Materials and Device)

  • Tianhao Yu

    (Beijing Graphene Institute)

  • Yan Zhang

    (Beijing Normal University)

  • Guo Ye

    (Beijing Normal University)

  • Han Cui

    (Shenzhen Traditional Chinese Medicine Hospital
    Chinese Academy of Sciences)

  • Chengzhi He

    (Beijing University of Chemical Technology)

  • Wenchao Jiang

    (Beijing Graphene Institute)

  • Yu Zhai

    (Beijing Normal University)

  • Chunming Lu

    (Beijing Normal University)

  • Xiaodan Gu

    (The University of Southern Mississippi, Center for Optoelectronic Materials and Device)

  • Nan Liu

    (Beijing Normal University
    Beijing Graphene Institute)

Abstract

Accurate and imperceptible monitoring of electrophysiological signals is of primary importance for wearable healthcare. Stiff and bulky pregelled electrodes are now commonly used in clinical diagnosis, causing severe discomfort to users for long-time using as well as artifact signals in motion. Here, we report a ~100 nm ultra-thin dry epidermal electrode that is able to conformably adhere to skin and accurately measure electrophysiological signals. It showed low sheet resistance (~24 Ω/sq, 4142 S/cm), high transparency, and mechano-electrical stability. The enhanced optoelectronic performance was due to the synergistic effect between graphene and poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), which induced a high degree of molecular ordering on PEDOT and charge transfer on graphene by strong π-π interaction. Together with ultra-thin nature, this dry epidermal electrode is able to accurately monitor electrophysiological signals such as facial skin and brain activity with low-motion artifact, enabling human-machine interfacing and long-time mental/physical health monitoring.

Suggested Citation

  • Yan Zhao & Song Zhang & Tianhao Yu & Yan Zhang & Guo Ye & Han Cui & Chengzhi He & Wenchao Jiang & Yu Zhai & Chunming Lu & Xiaodan Gu & Nan Liu, 2021. "Ultra-conformal skin electrodes with synergistically enhanced conductivity for long-time and low-motion artifact epidermal electrophysiology," Nature Communications, Nature, vol. 12(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-25152-y
    DOI: 10.1038/s41467-021-25152-y
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