fig8
Figure 8. Recent advances in active layers design in electrochromic sensor displays. (A) The electrochromic sensors architecture, power source, and information display. Reproduced with permission[111]. Copyright 2019, Elsevier; (B) Flexible electrochromic sensor’s structure and evolution of the display color change as a function of lactate concentrations[60]. Reproduced with permission. Copyright 2021, Elsevier.