Fig. 2From: Multifunctional fish gelatin hydrogel inverse opal films for wound healingThe schematic, SEM image and photograph of a the CCA template, b the hydrogel penetrated composite material and c the resultant IOF. In each panel, the left is the schematic, the middle is the SEM image and the right is the photograph. In each panel, scale bars are 200Â nm in the middle and 5Â mm in the rightBack to article page