Fig. 3.

Degradation analysis of FMSs incubated with the collagenase (C_Ful = 10 μM, 0.035 wt% in respect to GelMA). a) The OM images showing morphological changes of FMSs over 5 weeks. The fine particles around FMSs increased in the early stage (D3-D7), and cracks (D24) and fractures (D21) of FMSs were observed in the late stage. b) The residual weight of FMSs (n = 3). The final residual component was fullerol (~0.035 wt%). c) The TEM image of fullerol nanocrystals in the degradation solution after 5 weeks.