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

Cited 11 time in Web of Science Cited 13 time in Scopus

Kim, Sangha; Park, Seongjin; Choi, Jina; Hwang, Wonseop; Kim, Sunho; Choi, In Suk; Yi, Hyunjung; Kwak, Rhokyun

Issue Date
Nature Publishing Group
Nature Communications, Vol.13 No.1, p. 6705
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. Sensory neurons convert external stimuli into spike signals, enabling energy-efficient information processing. Here, Kwak et al. present a sensory neuron-inspired epifluidic wireless patch and demonstrate spike-based energy-efficient sweat monitoring.
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  • College of Engineering
  • Department of Materials Science & Engineering
Research Area High Temperature Alloys, High Strength , Nano Mechanics and Nano Structure Design for Ultra Strong Materials, Shape and Pattern Design for Engineering Materials


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