Fig. 1. Morphological characterization of PCBTh-co-ThMAA in the form of (A) freeze-dried powder with metallic luster after dialysis (for hydrogel preparation), (B) wet hydrogel after equilibrated in water (with PCBMA hydrogel as a reference) (8 mm in diameter), (C–E) freeze-dried hydrogel by SEM (scale bars: (C) 300 μm, (D) 100 μm, (E) 30 μm).
