Figure 8.

(A) Average hydrodynamic diameter of the degradation products versus degradation time from LbL film 1 and LbL film 2. AFM image of typical particles: (B) particles released at 6 hours from LbL film 1 with diameter 233±48 nm, Z range: 50 nm; (C) released at 6 days from LbL film 1 with diameter 216±55 nm, Z range: 50 nm; (D) released at 6 hours from LbL film 2 with diameter 227±20 nm, Z range: 50 nm; and (E) released at 6 days from LbL film 2 with diameter 395±69 nm, Z range: 120 nm. Contact mode in PBS buffer, scale bar =0.2 μm.

Abbreviations: D_H, hydrodynamic diameter; LbL, layer-by-layer; AFM, atomic force microscopy.