Formation of weak polyelectrolyte multilayers studied by spin labeling.

摘要: Multilayers of alternately adsorbing poly(allylamine) (PAH) and poly(acrylic acid) (PAA) opposite charges on silica have been studied by the spin labeling technique, as a function pH. The two polyelectrolytes labeled independently nitroxide free radical. Its electron paramagnetic resonance spectrum is mainly sensitive to local Brownian motion shows lines typical different environments, namely, loops protruding in solution with fast trains adsorbed solid hindered motion. These parts evaluated for each polymer layers separately, thickness coatings has described more precisely characterizing four contributions existing, example, bilayer. Complexation demonstrated loss tails belonging first polyelectrolyte. overall picture emerging from data explained terms compensation entropy confinement.