fig9

Figure 9. Overall design and colorimetric analysis of the nanofiber-based multimodal analytical system for sweat monitoring. (A) Exploded schematic of the wearable platform showing distinct layers for colorimetric sensing and electrochemical sensing, along with NFC electronics and circuit encapsulation; (B) Functionalized nanofiber films for glucose, lactate, chloride (Cl^-), pH, and urea detection; (C-G) Calibration plots showing normalized RGB percentage responses corresponding to varying concentrations of glucose, lactate, Cl^-, pH, and urea, enabling quantitative sweat biomarker analysis. Reprinted with permission from^[130], Copyright © 2022 Elsevier B.V. All rights reserved. NFC: Near field communication.