Fig. 2.

Characterization of BP@Gel. A TEM image of BP nanosheets. Scale bar: 200 nm. B TEM image of BP-PEG-AgSD. Scale bar: 200 nm. C SEM image of BP@Gel. Scale bar: 1.0 μm. D The scanning transmission map and elemental mapping map of BP-PEG-AgSD. Scale bar: 200 nm. E Particle size maps of BP, BP-PEG, and BP-PEG-AgSD nanosheets. F Infrared spectrum of CS/β-GP/HPC hydrogel. G Diagram of the sol–gel phase transition of Gel and BP@Gel. H In vitro drug release rate of BP@Gel