We investigate the occurrence of exotic structures in the outermost layers of neutron stars within the framework of a microscopic model. The nucleonic dynamics is described through a timedependent mean field approach at low temperature. In this model starting from an initial crystalline lattice of nuclei at subnuclear densities the system evolves and self-organizes in various low-lying energy structures without assumption of final shapes. The effect on the behavior of these structures due to

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... ferent lattice symmetries, densities, nuclear composites and lattice perturbations are analyzed. We investigate the sensitivity of transport properties of the nuclear medium to the occurrence of non-spherical clusters.