We perform water self-diffusion measurements in ternary DDAB microemulsions near the structural transition point. This allows experimental investigation of the predicted anomalous diffusion behavior exhibited near a static percolation transition. Near the transition point time-dependent behavior is observed. The scaling behavior is consistent with theory for a static percolative medium. This is the first time anomalous diffusion has been experimentally measured in a well-characterized porous media.

• Received 15 March 1995

DOI:https://doi.org/10.1103/PhysRevLett.75.653