Preparation of Polysaccharide-Based Microspheres by a Water-in-Oil Emulsion Solvent Diffusion Method for Drug Carriers

Figure 3

SEM images of broken drug-free microspheres of (a) 15 kDa chitosan, (b) 100 kDa chitosan, (c) potato starch, and (d) alginate. All bars = 5 𝜇m.

(a)

(b)

(c)

(d)