fig7

Figure 7. Flexible synthetic hydrogel-based pressure sensors. (A) Schematic illustrating the configuration of a hydrogel-based sensor and photographs showing its application in the monitoring of eel motions and the beating of a rabbit heart. Reproduced with permission^[116]. Copyright 2022, Wiley-VCH GmbH. (B) Schematic illustrating the composition of a highly deformable and anti-freezing multi-crosslinked PVA hydrogel and hydrogel-based multimode wearable sensors. Reproduced with permission^[119]. Copyright 2020, Royal Society of Chemistry. (C) Schematic illustrating the fabrication process and composition of a PVA/PEG-g-ChNC conductive organohydrogel. Reproduced with permission^[120]. Copyright 2022, Elsevier. PVA: poly(vinyl alcohol); PEG: polyethylene glycol; ChNC: chitin nanoscrystal.