@article{ISI:000084006900013, abstract = {We present important new results from light-microscopy and rheometry on a moderately concentrated lyotropic smectic, with and without particulate additives, Shear-treatment aligns the phase rapidly, except for a striking network of oily-streak defects, which anneals out much more slowly. If spherical particles several microns in diameter are dispersed in the lamellar medium, part of the defect network persists under shear-treatment, its nodes anchored on the particles. The sample as prepared has substantial storage and loss moduli, both of which decrease steadily under shear-treatment. Adding particles enhances the moduli and retards their decay under shear. The data for the frequency-dependent storage modulus after various durations of shear-treatment can be scaled to collapse onto a single curve. The elasticity and dissipation in these samples thus arises mainly from the defect network, not directly from the smectic elasticity and hydrodynamics.}, author = {Basappa, G and Suneel and Kumaran, V and Nott, PR and Ramaswamy, S and Naik, VM and Rout, D}, doi = {10.1007/s100510051004}, issn = {1434-6028}, journal = {EUROPEAN PHYSICAL JOURNAL B}, month = {NOV}, number = {2}, pages = {269-276}, title = {Structure and rheology of the defect-gel states of pure and particle-dispersed lyotropic lamellar phases}, unique-id = {ISI:000084006900013}, volume = {12}, year = {1999} }