fig6

Figure 6. On-body performance of the soft wearable multiplex biosensor for real-time sweat analysis. (A) The wearable biosensor patched onto the volunteer’s arm prior to exercise, showing the initial colors: blue for the urea and lactate sensors, and green for the glucose sensor; (B) Initial λ_PBG of 430, 432, and 502 nm for the urea, lactate, and glucose sensors, respectively; (C) After 30 min of exercise, the biosensor is fully saturated with sweat, with all sensors shifting to a mint green color; (D) The measured Δλ_PBG of 31, 34, and 16 nm for urea, lactate, and glucose sensors, respectively, corresponding to concentrations of 12.83 mM urea, 13.1 mM lactate, and 0.39 mM glucose, confirming the healthy status of the volunteer.