We discuss novel interparticle force between colloids in nematic liquid crystal. The dependence of the interparticle force on the interparticle distance was experimentally measured by optical tweezers for the same and different sized particles. The obtained force curves quantitatively make agreement with the theory based on electrostatic analogy and the numerical calculation. We also present the self-assembling and artificial ways for building colloidal assemblies in nematic liquid crystal.
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