Fig. 1: Skin-interfaced, time-resolved sweat sensing.
From: Time-resolved cortisol monitoring with skin-interfaced wearable sensors
a, Wearable LFA patch with integrated electrical trigger and timer. b, Structure and mechanism of the LFA. c, Concept of an active timing path with electrical trigger and timer. d, Concept of a passive timing path with paper-gated self-timing cell. Figure adapted from ref. 2, Springer Nature Ltd.
