Study of Interfacial Curvature in a Three-Component Microemulsion with Equal Volumes of Water and Oil

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Abstract
We have used a double-contrast-variation method in small-angle neutron scattering to study the structure of a single-phase microemulsion containing equal amounts of oil (decane) and water stabilized with an aerosol OT surfactant. It is determined that the water-internal-droplet structure persists in this concentrated regime. We believe that this is the first observation of a nonvanishing mean curvature of the interfacial surfactant film in microemulsions with an oil-water ratio of unity.

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