fig6

Figure 6. (A) A continuous glucose monitor by coating the sensor with a zwitterionic polymer. Reproduced with permission from^[108]. Copyright 2018, Springer Nature; (B) The polyCB/polySB ZEN hydrogels: design principles, high mechanical properties, equilibrium swelling ratios and equilibrium water contents. Reproduced with permission from^[111]. Copyright 2021, American Association for the Advancement of Science; (C) PDA-clay-polySBMA hydrogels: the schematic illustration, the adhesion mechanism, the hydrogel sensor for monitoring tissue vibration. Reproduced with permission from^[24]. Copyright 2020, The Royal Society of Chemistry. CGM: Continuous glucose monitoring; ZEN: zwitterionic-elastomeric-networked; CB: carboxybetaine; SB: sulfobetaine; PDA: polydopamine; SBMA: sulfobetaine methacrylate.