Thicknesses of the dendrimer polyelectrolyte layers deposited in the interior of the AAO nanomebranes from 100 mM NaCl aqueous solutions, as determined by optical waveguide spectroscopy (OWS). The data labels indicate the initial membrane pore diameters. In comparison, the dendrimer diameter is 7 nm. Reproduced and adapted with permission from Lazzara et al. ACS Nano, 2010, 4, 3909. Copyright 2010 American Chemical Society.