Synthesis, Characterization, and In Vitro Drug Delivery of Chitosan-Silica Hybrid Microspheres for Bone Tissue Engineering

Figure 1

SEM images of (a) pure CS, (b) CS-20%SiO₂, and (c) CS-40%SiO₂ hybrid microspheres. The insets of (a) and (b) showed the high-magnification SEM images of the pure CS and CS-20%SiO₂ microspheres, respectively.

(a)

(b)

(c)