Figure 5.

Schematic illustrations of incorporating graphene-based materials into hydrogel matrixes; The formation of graphene-hydrogel composite materials by (A): self-assembly and photo-crosslinking between graphene and peptide, reproduced with permission from [99]. Copyright Royal Society of Chemistry, 2015; (B): photopolymerization of vinyl moieties present on surface of graphene and polymer chains, reproduced with permission from [91]. Copyright American Chemical Society, 2015; (C): in situ biosynthesis, reproduced with permission from [103]. Copyright Royal Society of Chemistry, 2014; (D): surface-grafted polymerization, reproduced with permission from [104]. Copyright American Chemical Society, 2012; (E): supramolecular self-assembly by hydrogen bonding, reproduced with permission from [102]. Copyright Royal Society of Chemistry, 2015.