fig8

Figure 8. Schematic diagram of the application of hydrogel strain sensor in detecting human motion. (A and C) Relative resistance changes of poly(sulfobetaine-co-acrylic acid)/chitosan-citrate (P(SBMA-co-AA)/CTS-Cit) DN hydrogel strain sensors at different angles of finger bending and (B) wrist bending. (D) Relative resistance changes of the hydrogel strain sensors when swallowing^[74]. Reproduced with permission^[74]. Copyright 2020, Elsevier.