Dynamics of the nematic phase of a bent-core liquid crystal.

Authors:
Strahinja Stojadinovic, Ph.D.
Strahinja Stojadinovic, Ph.D.
UT Southwestern Medical Center
Associate Professor
Medical Physics
Dallas, TX | United States

Phys Rev E Stat Nonlin Soft Matter Phys 2002 Dec 26;66(6 Pt 1):060701. Epub 2002 Dec 26.

Department of Physics, Kent State University, Kent, OH 44242, USA.

The dielectric fluctuations in the uniaxial nematic phase of a bent-core liquid crystal have been studied by dynamic light scattering. Polarization selection of the scattering cross-section reveals one mode due to ordinary director fluctuations and, in the lower part of the nematic phase, a second mode attributable to fluctuations of the biaxial order parameter. The director fluctuations are approximately 100 times slower than observed in typical nematics based on straight-core molecules, suggesting that the bent core nematogenic units may be microscopic smectic domains ("cybotactic" clusters).

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http://dx.doi.org/10.1103/PhysRevE.66.060701DOI Listing
December 2002
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