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Article
Inelastic Collisions and Anisotropic Aggregation of Particles in a Nematic Collider Driven by Backflow
Physical Review Letters
  • Oleg P. Pishnyak, Kent State University - Kent Campus
  • Sergij V. Shiyanovskii, Kent State University - Kent Campus
  • Oleg Lavrentovich, Kent State University - Kent Campus
Publication Date
1-24-2011
Document Type
Article
DOI
10.1103/PhysRevLett.106.047801
Keywords
  • colloidal particles,
  • liquid-crystal,
  • microspheres,
  • fluids,
  • field
Disciplines
Abstract
We design a nematic collider for controlled out-of-equilibrium anisotropic aggregation of spherical colloidal particles. The nematic surrounding imparts dipolar interactions among the spheres. A bidirectional backflow of the nematic liquid crystal in a periodic electric field forces the spheres to collide with each other. The inelastic collisions are of two types, head to tail and head to head. Head-to-tail collisions of dipoles result in longitudinal aggregation while head-to-head collisions promote aggregation in the transversal direction. The frequency of head-to-head collisions is set by the impact parameter that controls the resulting shape of aggregates, their anisotropy, and fractal dimension.
Comments

Copyright 2011 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevLett.106.047801.

Citation Information
Oleg P. Pishnyak, Sergij V. Shiyanovskii and Oleg Lavrentovich. "Inelastic Collisions and Anisotropic Aggregation of Particles in a Nematic Collider Driven by Backflow" Physical Review Letters Vol. 106 Iss. 4 (2011)
Available at: http://works.bepress.com/oleg_lavrentovich/18/