Abstract
The authors have performed an extensive series of dynamic light scattering measurements of a three-component water-in-oil microemulsion system, consisting of AOT/water/decane, throughout the isotropic one-phase region at water to AOT molar ratio X=40.8, covering wide ranges of volume fraction phi and temperature T above and below the percolation threshold. The droplet density correlation function at long time has a nonexponential form for phi >0.4 and below the percolation threshold. When fitted to a stretched exponential function the apparent exponent beta , starting at about 0.7 at the lowest temperatures, increases continuously and approaches unity at the percolation temperature and above. The initial and the average decay rates of the correlation function, as a function of temperature, show an abrupt change of slope at the percolation threshold.
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