DYNAMICS OF MICROEMULSIONS AS SEEN BY NEUTRON SPIN-ECHO

Neutron spin echo (NSE) was employed to study the dynamics of a variet y of microemulsion phases. Starting from the droplet phase, we present very recent results on the lamellar and sponge (L3) phases. Combining the well-known contrast-variation method of small-angle neutron scatt ering (SANS) with the unique energy resolution of NSE we can separate motions which are otherwise undetectable. Combining the static and dyn amical experiments, microscopic parameters like the bending rigidity ( K) could be deduced. We find, for example, that the local dissipation is 4-6 times higher than would be predicted from the solvent viscositi es.