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Electrorotation of Colloidal Particles in Liquid Crystals
Physical Review E
  • Guangxun Liao
  • Ivan I. Smalyukh
  • J. R. Kelly
  • Oleg D. Lavrentovich, Kent State University - Kent Campus
  • Antal Jakli, Kent State University - Kent Campus
Publication Date
Document Type
  • smectic-A-phase,
  • microrheology,
  • shear
We present the first observations of dc electric-field-induced rotational motion of finite particles in liquid crystals. We show that the electrorotation is essentially identical to the well-known Quincke rotation, which in liquid crystals triggers an additional translational motion at higher fields. In the smectic phase the translational motion is confined to the two-dimensional geometry of smectic layers, in contrast to the isotropic and nematic phases, where the particles can move in all three dimensions. We demonstrate that by a proper analysis of the electrorotation, one can determine the in-plane viscosity of smectic liquid crystals. This method needs only a small amount of material, does not require uniform alignment over large areas, and enables probing rheological properties locally.

Copyright 2005 American Physical Society. Available on publisher's site at

Citation Information
Guangxun Liao, Ivan I. Smalyukh, J. R. Kelly, Oleg D. Lavrentovich, et al.. "Electrorotation of Colloidal Particles in Liquid Crystals" Physical Review E Vol. 72 Iss. 3 (2005)
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