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. 2021 Dec 8;9:774210. doi: 10.3389/fbioe.2021.774210

FIGURE 2.

FIGURE 2

(i) Schematic illustration demonstrating the fabrication of the self-powered sensor for point-of-care sweat monitoring (A), a photograph of the fabricated sensor (B), and photographs of the point-of-care sensor on the forehead of the volunteer when exercising 0 min (C), after 29-min exercise (D), and after 32-min exercise (E) (Zhang et al., 2018a). (ii) Working of the WCECS in real time on the body. (A) Photograph of the WCECS attached on the back of a human subject. (B) EC response of sweat glucose in the post-meal and fasting state. (C) Contrast of the sweat glucose concentrations sensed by the WCECS glucometer and glucose test kit. (D) Comparison of the glucose concentrations detected in 1 day by the glucometer, glucose test kit, and WCECS. (E) Evaluation of durability of the WCECS (Zheng et al., 2021).