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Communications: Short-range dynamics of a nematic liquid-crystalline phase
8.P. N. Pusey, Liquids, Freezing, and the Glass Transition (North-Holland, Amsterdam, 1991) pp. 763–942.
22.Considering an ionic strength of 10 mM, the data of Solomon and Boger (Ref. 19) give a value of using the low concentration expansion and 0.25 using the overall formula (for an aspect ratio of 8.4). Rheology measurements performed at room temperature in aqueous suspension at the same concentration (6.7%) also yield , but the comparison is not straightforward due to the lack of information on the electrostatic effects in the presence of propane-1,3-diol.
23.A. J. Banchio, J. Gapinski, A. Patkowski, W. Häußler, A. Fluerasu, S. Sacanna, P. Holmqvist, G. Meier, M. P. Lettinga, and G. Nägele, Phys. Rev. Lett. 96, 138303 (2006).
24.We define a 2D system as invariant under translation along the normal direction, in contrast with the extensively studied quasi-2D systems that consist of particles confined at an interface or between rigid boundaries.
25.J. Happel and H. Brenner, Low Reynolds Number Hydrodynamics (Martinus Nijhoff, Dordrecht, 1983).
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Using x-ray photon correlation spectroscopy, we studied the dynamics in the nematic phase of a nanorodsuspension. The collective diffusion coefficient in the plane perpendicular to the director varies sharply with the wave vector. Combining the structure factor and the diffusion coefficient, we find that the hydrodynamic function of the phase decreases by more than a factor of 10 when going from length scales comparable to the interparticle distance toward larger values. Thus, the collective dynamics of the nematic phase experiences strong and scale-dependent slowing down, in contrast with isotropic suspensions of slender rods or of spherical particles.
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