Fig. 2. The physical characterizations of cytokine-loaded PCL-PEG scaffold composite. (A) A representative scanning electron microscopy (SEM) image of PCL; (B and C) analysis of PCL by infrared spectrum (IR) and nuclear magnetic resonance spectroscopy (NMR); (D and E) a representative scanning electron microscopy (SEM) image of PEG and cytokine-loaded PCL-PEG scaffold composite; (F) enlarged view of the scaffold composite.
