Fig. 4

SEM and FCFM images of the ADSCs on the surface of and inside the hydrogel in after 14 days of culture. a1–a3 SEM images of ADSCs on the surface of SNVI-RADA16 hydrogel at a magnification of 1600 × , 3000 × , and 6000 × . b1–b3 SEM images of ADSCs on the surface RADA16 hydrogel at a magnification of 1600 × , 3000 × , and 6000 × . c1 FCFM image of ADSCs inside SNVI-RADA16 hydrogel (100 ×). c2 FCFM image of ADSCs inside RADA16 hydrogel (100 ×). Live cells (more than 90%) are stained green, and dead cells (less than 10%) are stained red