Contrast-variation SANS (CV SANS) will be used to determine how surfactant inverse micelles interact with model metal oxide colloids. By using deuterated surfactant (D-AOT) with associated H2O as well as H-AOT with associated D2O, it will be possible to determine whether proton (deuteron) transfer occurs, and if so, whether the surfactant adsorbs appreciably on the surface. By systematically varying the metal oxide type and surfactant concentration, this study will reveal any universal behavior.