This paper introduces an epifluidic electronic patch with a spiking sweat clearance mechanism for energy-efficient, long-term wireless monitoring of perspiration. The patch uses a sweat VIA sensor with a vertical sweat-collecting channel and nanomesh electrodes. The sensor generates spike patterns based on sweat rate and ionic conductivity, enabling event-driven data transmission and significantly reducing energy consumption compared to continuous monitoring. The patch successfully decodes perspiration dynamics during exercise, showing potential for applications in digital healthcare.

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