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Title: Twist viscoelastic coefficient of novel thiol terminated alkoxy-cyanobiphenyl nematic liquid crystals
Authors: Agarwal, Amit K.
Suresh, K.A.
Pal, Santanu Kumar
Kumar, Sandeep
Issue Date: 28-Apr-2007
Publisher: American Institute of Physics
Citation: Journal of Chemical Physics, 2007, Vol.126, p164901
Abstract: We report our studies on the refractive indices and twist viscoelastic coefficient of novel thiol terminated alkoxy-cyanobiphenyl nematic liquid crystals. Dynamic light scattering (DLS) was employed to measure the twist viscoelastic coefficient as a function of temperature and the length of alkoxy chain. Our studies show that the twist viscoelastic coefficient is about three times smaller than that of the ordinary alkoxy-cyanobiphenyl nematic liquid crystals. DLS experiments carried out on this system with applied electric field show that the director relaxation frequency increases. These measurements yield the ratio of dielectric anisotropy to twist viscosity. We have also estimated the activation energy corresponding to twist viscosity.
Description: Open Access.
ISSN: 0021-9606
1089-7690 (Online)
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Copyright: 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Appears in Collections:Research Papers (SCM)

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