Interactions between surfactants and silver nanoparticles of varying charge

► Silver nanoparticles (Ag NP) of various charge interact with charged and uncharged surfactants. ► Electrostatic interactions of oppositely charged Ag NPs and surfactants produce large changes in surface charge above CMC. ► Cooperative adsorption plays an important role in charge reversal of Ag NPs in the presence of surfactants.