Fig. 2

GNP-Exos material characterization. A Schech showing the electrostatically assemble of GNPs and DSC-Exos. B Zeta potential of GNPs, ADSC-Exos and GNPs-Exo. C, D SEM and LSCM showing distribution of ADSC-Exos in GNPs hydrogel in 2D and 3D approach (Scale bar = 1 μm). E, F rheology of GNPs-Exo including the viscoelastic properties and self-healing capacity. G Release behavior of ADSC-Exos in PBS. * P < 0.05, ** P < 0.01 using one-way ANOVA and Student-Newman-Keuls test