Publication Title

Physical Review E

Publication Date

3-7-2011

Document Type

Article

Disciplines

Physics

Abstract

Using a combination of dynamic light scattering and Freedericksz transitions induced in applied magnetic and electric fields, we have determined the absolute magnitudes of the Frank elastic constants and effective orientational viscosities of the bent-core nematic liquid crystal, 4-chloro-1,3-phenylene bis 4-[4'-(9-decenyloxy)benzoyloxy] benzoate. At a fixed temperature 2 degrees C below the isotropic-nematic transition, we find K(11) = 3.1 x 10(-12) N, K(22) = 0.31 x 10(-12) N, K(33) = 0.88 x 10(-12) N, eta(splay) = 1.1 Pa s, eta(twist) = 0.37 Pa s, and eta(bend) = 1.2 Pa s. The unusual anisotropies of these parameters are discussed in terms of short-range, smectic-C-like correlations among molecules in the nematic phase.

Comments

Copyright 2011 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevE.83.031701.


Included in

Physics Commons

Share

COinS