Fig. 6
From: Stimuli-responsive DNA-based hydrogels for biosensing applications
Reproduced with permission from Ref. [139]. B Surface-immobilized enzyme@DNA hydrogel formed by surficial primer-induced (SPI) strategy. Reproduced with permission from Ref. [140]. C The hydrogel film immobilizes on electrode through HPA and pH induces the crosslinked density change. Reproduced with permission from Ref. [142]
Schematic illustration of stimuli-responsive hydrogel-based electrochemical biosensing strategies. A The self-assembly DNA hydrogel is immobilized on ITO electrode and miR-21 can induce the dissociation of it through recognizing with probe.