Fig. 1.

Fabrication of LbL nanocomposite thin films based on PB. (a) Generalized schematic detailing the deconstruction of PB-based films containing drugs or other chemical species [blue circles represent PB nanoparticles and red lines represent drugs or chemical species (with or without a second encapsulating species)]. (b) Absorbance (700 nm) versus number of deposited tetralayers for the (LPEI/PB/LPEI/¹⁴C-DS)₃₀ system as determined by UV-vis spectroscopy. Absorbance values are normalized to the absorbance of a 25-tetralayer film. (Inset) Thickness (nm) versus number of deposited tetralayers in the same system as determined by profilometry. Measurements were performed at six predetermined spots on the surface of the films, and error bars represent one standard deviation in measured values.