Structure-factor scaling at the isotropic-to-nematic transition of cesium perfluoro-octanoate

The structure factor of the lyotropic liquid-crystal cesium perflouro-octanoate--water after the material has been quenched form the isotropic phase to the nematic phase was found to display non-Porod power-law behavior in the limit of large wave vectors. Our measurements were consistent with the scaling law S(q,t){~}t^-3/2{q}^{{{-}}6}for bulk samples and S(q,t)~{t}^{{{-}}1}q^-4 for thin samples exhibiting two-dimensional behavior. Dimensional crossover was also observed.