Quadrupolar forces and aggregation of nematic droplets |
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Authors: | I E Dzyaloshinskii E I Kats J Lajzerowicz |
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Institution: | (1) Deptartment of Physics, University of California, Irvine, CA 92612, USA;(2) Landau Institute of Theoretical Physics, Russian Academy of Sciences, 117940 Moscow, Russia;(3) Laboratoire de Spectrometrie Physique, Univ. Joseph-Fourier Grenoble 1, France |
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Abstract: | The electrostatic quadrupolar interaction between spherical nematic droplets in an isotropic (and nonconducting) liquid is
calculated. It is found to have an anisotropic form U
q
∝1/R
5, where R is the distance between droplets, with repulsion for droplets having parallel orientation of the quadrupole moments and attraction
at oblique angles around the orthogonal orientation. In an external magnetic field aligning the orientations of the quadrupole
moments, a competition of the quadrupolar repulsion and van der Waals attraction (U
vdW∝ 1/R
6) leads to a specific spatial organization of droplets which is in fact often reported in experimental observations (see the
monograph by P. Drzaic, Liquid Crystal Dispersions, World Scientific, Singapore (1995) and references cited therein).
Pis’ma Zh. éksp. Teor. Fiz. 68, No. 10, 747–752 (25 November 1998)
Published in English in the original Russian journal. Edited by Steve Torstveit. |
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Keywords: | |
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