Elasticity, viscosity, and orientational fluctuations of a lyotropic chromonic nematic liquid crystal disodium cromoglycate.

@article{Zhou2014ElasticityVA,
  title={Elasticity, viscosity, and orientational fluctuations of a lyotropic chromonic nematic liquid crystal disodium cromoglycate.},
  author={Shuang Zhou and Krishna Neupane and Yuriy A. Nastishin and Alan R Baldwin and Sergij V. Shiyanovskii and Oleg D Lavrentovich and Samuel N. Sprunt},
  journal={Soft matter},
  year={2014},
  volume={10 34},
  pages={6571-81}
}
Using dynamic light scattering, we study orientational fluctuation modes in the nematic phase of a self-assembled lyotropic chromonic liquid crystal (LCLC) disodium cromoglycate and measure the Frank elastic moduli and viscosity coefficients. The elastic moduli of splay (K1) and bend (K3) are in the order of 10 pN while the twist modulus (K2) is an order of magnitude smaller. The splay constant K1 and the ratio K1/K3 both increase substantially as the temperature T decreases, which we attribute… CONTINUE READING

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