Wearable sweat analytics require sensors that are simultaneously chemically selective, mechanically conformal, and highly breathable. Here, we report a flexible electrochemical platform that integrates a polyaniline‐modified gold electrode for pH detection with a laser‐reduced graphene oxide electrode for uric acid sensing on a thermoplastic polyurethane nanofiber membrane. The porous substrate (59.5 mm/s air permeability; 2716.6 g/m 2 ·24 h water vapor transmission rate) sustains skin comfort while minimizing sweat‐induced drift. The device delivers a near‐Nernstian pH response (59.98 mV/pH, pH 4–8) and a linear uric acid signal (50–500 µM) with strong anti‐interference capability; on‐body tests show <6% deviation from a commercial pH meter and stable dual‐analyte readouts during 8 h of activity. The device architecture offers an extensible platform for noninvasive, real‐time biochemical monitoring in personal health, athletics, and disease prevention.
Zheng et al. (Sun,) studied this question.