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Synthesis of cross-linked CS/PBI-DOPA hydrogels. (a) Reaction demonstrating interaction between PTCDA and dopamine, (b) Structure of PBI-DOPA, (c) Interaction between oxidized PBI-DOPA and CS chains via crosslinking (d) Structure of the photosensitive CS/PBI-DOPA hydrogel, (e) Digital photo of the hydrogel, (f) Schematic diagram of the hydrogel, and (g) cross-linking mechanism [54]. Copyright 2023. Reproduced with permission from Elsevier.
