Figure 5.

(A) Schematic diagram and (B) actual image of Sundew-inspired adhesive hydrogel (mucilage) for controlled drug delivery in a chronic wound healing. Inset in (B) exhibits a prey trapped by the Sundew mucilage. (C) AFM image of the Sundew mucilage; (D) SA, ArG, and Ca²⁺ used for Sundew mucilage; and (E) hydrogel forming by SA and ArG with Ca²⁺ as crosslinking agent, characteristic of adhesive hydrogel by touching and pulling the hydrogel, porous network structure (AFM image), and the potential applications for drug delivery and wound healing. Reproduced with the permission from [190]. Copyright 2017, American Chemical Society.