Figure 9.

AFM bearing volume and representative AFM height images of the released PAA-DNA complex from LbL film 1. The images were captured in tapping mode in air. The bearing size of complexes has a typical error of 30%. (A, B) Complexes collected in 6 hours film degradation. Z range is 80 nm (A) and 180 nm (B). (C, D) Complexes released out from LbL film 1 collected on day 7. Z range for (C and D) is 40 nm. Scale bar in all 4 images is 500 nm.

Abbreviations: AFM, atomic force microscopy; PAA, poly(amido amine); LbL, layer-by-layer.