Ion-Specific and Solvent Effects on PDADMA–PSS Complexation and Multilayer Formation

Among various parameters that influence the formation of polyelectrolyte complexes and multilayers, special emphasis should be placed on ion-specific solvent effects. In our study, we systematically examined above-mentioned effects poly(diallyldimethylammonium chloride) (PDADMACl)-sodium poly(4-styrenesulfonate) (NaPSS) complexation in solution at surface by means dynamic light scattering, ellipsometry atomic force microscopy measurements. As solvents, used water water/ethanol mixture. The obtained results confirm importance prepared solution, as well multilayers built up a silica surface. experiments mixed showed higher ethanol mole fraction, decrease monomer titrant to titrand ratio, which increase size is observed, takes place. difference between chloride bromide ions was more pronounced fraction case positive complex formation, suggesting larger amount could condensed polycation chain. These findings are accordance with for helpful designing tuned properties needed applications, primarily field biomedicine.