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An epifluidic electronic patch with spiking sweat clearance for event-driven perspiration monitoring

Author

Listed:
  • Sangha Kim

    (Hanyang University)

  • Seongjin Park

    (Korea Institute of Science and Technology)

  • Jina Choi

    (Hanyang University)

  • Wonseop Hwang

    (Korea Institute of Science and Technology)

  • Sunho Kim

    (Korea Institute of Science and Technology)

  • In-Suk Choi

    (Seoul National University)

  • Hyunjung Yi

    (Korea Institute of Science and Technology
    YU-KIST Institute, Yonsei University)

  • Rhokyun Kwak

    (Hanyang University
    Hanyang University)

Abstract

Sensory neurons generate spike patterns upon receiving external stimuli and encode key information to the spike patterns, enabling energy-efficient external information processing. Herein, we report an epifluidic electronic patch with spiking sweat clearance using a sensor containing a vertical sweat-collecting channel for event-driven, energy-efficient, long-term wireless monitoring of epidermal perspiration dynamics. Our sweat sensor contains nanomesh electrodes on its inner wall of the channel and unique sweat-clearing structures. During perspiration, repeated filling and abrupt emptying of the vertical sweat-collecting channel generate electrical spike patterns with the sweat rate and ionic conductivity proportional to the spike frequency and amplitude over a wide dynamic range and long time (> 8 h). With such ‘spiking’ sweat clearance and corresponding electronic spike patterns, the epifluidic wireless patch successfully decodes epidermal perspiration dynamics in an event-driven manner at different skin locations during exercise, consuming less than 0.6% of the energy required for continuous data transmission. Our patch could integrate various on-skin sensors and emerging edge computing technologies for energy-efficient, intelligent digital healthcare.

Suggested Citation

  • Sangha Kim & Seongjin Park & Jina Choi & Wonseop Hwang & Sunho Kim & In-Suk Choi & Hyunjung Yi & Rhokyun Kwak, 2022. "An epifluidic electronic patch with spiking sweat clearance for event-driven perspiration monitoring," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-34442-y
    DOI: 10.1038/s41467-022-34442-y
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    References listed on IDEAS

    as
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    2. Wei Gao & Sam Emaminejad & Hnin Yin Yin Nyein & Samyuktha Challa & Kevin Chen & Austin Peck & Hossain M. Fahad & Hiroki Ota & Hiroshi Shiraki & Daisuke Kiriya & Der-Hsien Lien & George A. Brooks & Ron, 2016. "Fully integrated wearable sensor arrays for multiplexed in situ perspiration analysis," Nature, Nature, vol. 529(7587), pages 509-514, January.
    3. Julia Brunmair & Mathias Gotsmy & Laura Niederstaetter & Benjamin Neuditschko & Andrea Bileck & Astrid Slany & Max Lennart Feuerstein & Clemens Langbauer & Lukas Janker & Jürgen Zanghellini & Samuel M, 2021. "Finger sweat analysis enables short interval metabolic biomonitoring in humans," Nature Communications, Nature, vol. 12(1), pages 1-13, December.
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