Journal
PHYSICAL REVIEW E
Volume 83, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.83.031701
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Funding
- NSF [DMR-0606160, DMR-0964765]
- Department of Energy [ER46572]
- Hungarian Research Fund OTKA [K81250]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0964765] Funding Source: National Science Foundation
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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.
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