The relaxation of microemulsions has been studied by means of the pressure-jump relaxation technique with conductimetric detection. Kohlrausch-Williams-Watts stretched exponentials {$\phi \mathrm{}\left(t\right)=A\exp [-{\left(\frac{t}{\tau }\right)}^b]$} were obtained in which the parameter $b$ increases with temperature from the percolation point of the microemulsions, attaining values greater than 1. These findings entail the existence of spatial, temporal, and energetic disorder associated with temperature-dependent anomalous (inhibited and enhanced) diffusion.

• Received 16 February 1988

DOI:https://doi.org/10.1103/PhysRevLett.61.1131