Microviscosity in AOT Reversed Micellar Core Determined with a Viscosity-sensitive Fluorescence Probe

Abstract

Abstract Microviscosity in AOT reversed micellar core, η, was determined with a viscosity-sensitive fluorescent probe, auramine O (AuO), as a function of R ( = [H2O]/[AOT]). With the increase in R, The η decreased rapidly in the region of R < 10, and leveled at about R = 20. AuO molecules located in the vicinity of water/surfactant interface suggested the presence of water bound to polar heads of AOT.