Phys. Rev. Lett. 100, 217803 (2008) [4 pages]2D Interactions and Binary Crystals of Dipolar and Quadrupolar Nematic ColloidsReceived 15 February 2008; published 30 May 2008 In this Letter, we demonstrate that the symmetry of the elastic interaction between the dipolar and quadrupolar colloidal particles in the nematic liquid crystal leads to a novel variety of 2D nematic “binary” colloidal crystals, which have not been observed in any colloidal system. The dipolar-quadrupolar interaction is highly anisotropic and shows a power-law dependence when the particles approach each other along the director field with a pair-binding energy of the order of several thousands of kBT for 4 μm diameter colloids. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.217803
DOI:
10.1103/PhysRevLett.100.217803
PACS:
61.30.−v, 64.70.pv
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