Fig. 2

The viability of hDPSCs seeded on CPC-chitosan (D–F) or CPC-chitosan-GO disks (G–I) at 1 day, 3 days, and 5 days, respectively. Live cells (shown in green) were numerous. Dead cells (shown in red) were few. Compared with blank control (A–C) group, the cells were spread well on both CPC-chitosan and CPC-chitosan-GO group at 1 day, respectively. Gradually, the inter-laces among the cells and extracellular matrix based on both CPC-chitosan and CPC-chitosan-GO group were constructed at 3 days and 5 days. J Percentage of live hDPSCs on CPC-chitosan or CPC-chitosan-GO at 1 day, 3 days, and 5 days, respectively. There was no significant difference between the CPC-chitosan group and CPC-chitosan-GO group (p > 0.1)