Fig. 6

Primary morphology and structure observation for the biphasic hierarchical architectures. Outward appearance before (A) and after (B) combination of hydrogel membrane; C SEM image of the perforations on the connection area of hydrogel mold and porous nCSi scaffold (in yellow dotted box); SEM images of the outer surface (D) and fracture surface (E); F Interface region between the hydrogel membrane and bioceramic scaffold at low magnification. Scale bar: 200 μm. The white dotted box and arrow indicate the microstructure of interface (G); Red dotted lines indicate the infiltration of hydrogel in the porous structure of scaffolds