Morphology and Release Kinetics of Protein-Loaded Porous Poly(L-Lactic Acid) Spheres Prepared by Freeze-Drying Technique

Figure 2

Electron microscopic images of the surface and interior of as-prepared FDPLLA particles. (a) 𝐶₀ = 2.0 wt%, surface, (b) 𝐶₀ = 2.0 wt%, interior, (c) 𝐶₀ = 5.0 wt%, surface, (d) 𝐶₀ = 5.0 wt%, interior, (e) 𝐶₀ = 8.0 wt%, surface, and (f) 𝐶₀ = 8.0 wt%, interior.

(a)

(b)

(c)

(d)

(e)

(f)