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Molecular Crystals and Liquid Crystals Volume 611, 2015 - Issue 1: 25th International Liquid Crystal Conference (ILCC 2014)
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Physics

The Electro-Optical Properties of Doping Polycyclic Aromatic Hydrocarbon Liquids in Twisted Nematic Liquid Crystals

Yen-Te ChiangInstitute of Applied Physics, National Taiwan University, Taipei, Taiwan
,
Tsu-Ruey ChouDepartment of Physics, National Taiwan University, Taipei, Taiwan
&
Chih-Yu ChaoInstitute of Applied Physics, National Taiwan University, Taipei, Taiwan;Department of Physics, National Taiwan University, Taipei, Taiwan;Molecular Imaging Center, National Taiwan University, Taipei, TaiwanCorrespondence[email protected]
Pages 49-57 | Published online: 06 Jul 2015
 
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Abstract

In this paper, doping liquid materials to enhance the electro-optical (EO) properties of twisted nematic liquid crystals (NLCs) was presented. Two polycyclic aromatic hydrocarbon (PAH) liquids, toluene and 1-methylnaphthalene, were chosen as dopants in order to lower the driving voltage and response time of the NLCs. We find that the main reason of this phenomenon is due to a large amount of reduction in the rotational viscosity of PAH liquids doped NLCs. Without the drawbacks of aggregation that the solid nanoparticles could have, the method of doping liquids provides a more reliable choice for applications in various LC display systems.

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