Internal structure of aggregates of two amphiphilic species in a lyotropic liquid crystal

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Abstract
The internal structure of a ribbon-like aggregate in an ordered mesophase with rectangular symmetry formed by two amphiphiles, sodium decyl sulfate and decanol, in presence of water, is investigated by neutron scattering. Our results show that the two amphiphiles are not uniformly distributed within the aggregate. Their relative concentration is modulated according to the local interfacial curvature of the aggregate. Such a concentration/curvature relationship may be an important point to understand the shape of the aggregates and therefore the polymorphism of lyotropic liquid crystals