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Time-dependent anisotropic small-angle neutron scattering (SANS) patterns of rodlike micelles in a shear gradient Γ, suddenly changing its value from zero to a constant value, are presented. The time resolution of the experiment was 100 ms. By an analysis of the steady-state pattern a rotational diffusion coefficient D of ~ 2 s−1 is deduced. Furthermore it is shown that in a well aligned sample the SANS pattern is sensitive to the rod length distribution in spite of correlation peaks which are caused by repulsive inter-micellar interaction.
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