Fig. 4
From: Stimuli-responsive DNA-based hydrogels for biosensing applications
Examples of stimuli-responsive DNA hydrogel-based colorimetric detection. A Preparation of DNA-functionalized monolithic hydrogels and AuNPs as color indicator. Reproduced with permission from Ref. [107]. B Fabrication of AND logic gate for cocaine and ATP detection. Reproduced with permission from Ref. [109]. C Enzyme trapped hydrogel for signal amplification and visual detection. Reproduced with permission from Ref. [46]