Stabilization of monolayers by metal nanoparticles manifested in oscillations of interfacial potentials

Stabilization of monolayers at the organic-aqueous interface by citrate protected Au nanoparticles is shown to affect the interfacial dynamics and this effect is manifested in the oscillations of the interfacial potential. Variation in the size and concentration of the nanoparticles systematically affects the oscillations, attributed to particle-induced stabilization of monolayers. A structural model of the monolayer to account for the observed changes is proposed.