Electrochemical Investigation of Dynamic Solution Structures of Bicontinuous Microemulsion at Solid Interfaces

Abstract

Abstract Dynamic solution structure of a three-phase interface (oil/water/solid) of a bicontinuous microemulsion (BME) was evaluated electrochemically with apparent diffusion coefficients (Dapp’s) from cyclic voltammograms. With hydrophilic (ITO) and lipophilic (pyrolytic graphite) electrodes, Dapp’s were much smaller than with an amphiphilic (Au) electrode. The Dapp ratios of ITO:PG-b in the BME were larger than those in a homogeneous aqueous solution. These results indicate that BME solution structures around hydrophilic and lipophilic electrodes adopt alternately layered structures but not simple sloped structures.