FIGURE 4.
Serum-based CGMs (Cai et al., 2020). (A) The structure of the glucose sensor, including polyethylene terephthalate (PET) substrate, working electrode, a counter electrode and insulating material. (B) The array of the electrodes. (C) The shape of the electrodes. (D) Photograph of the electrodes binding at 90°. (E) The glucose monitoring tested on a rat.