VOLTAGE DEPENDENCE OF SOME NEMATIC LIQUID CRYSTALS’ ELECTRIC PROPERTIES
Abstract
The nematic liquid crystals are very important materials in the production of display systems and many technological applications. It is necessary to investigate the physical and electrical properties of the nematic liquid crystals. Voltage dependence of impedance, modulus and loss tangent of 6CB, 8CB and E7 nematic liquid crystals were investigated at 0-20V DC volts range, room temperature and 1 kHz frequency. The real electric modulus of the 6CB and 8CB samples shows a small increase due to the increase in voltage and 8CB real modulus values are bigger than from 6CB real modulus values. The real modulus of the E7 has a damping of around 7 volt and is small at high voltages. The imaginary electric modulus of the samples is decrease with voltage increase. The loss tangent values of the 6CB and 8CB samples decreases after a certain voltage value. Absolute impedance of the 6CB, 8CB samples have wavy behavior and the absolute impedance of E7 approaches zero at all voltage values.
Keywords
References
- Bahadur, B. (1990). Liquid crystals: applications and uses (Vol. 1): World scientific.
- Chen, A. G., & Brady, D. J. (1992). Real-time holography in azo-dye-doped liquid crystals. Optics letters, 17(6), 441-443.
- Eskalen, H., Kerli, S., & Özğan, Ş. (2017). Hydrothermally produced cobalt oxide nanostructures at different temperatures and effect on phase transition temperature and threshold voltage of nematic liquid crystal host. Cobalt, InTech, 71-85.
- Eskalen, H., Okumuş, M., & Özğan, Ş. (2019). Electro-optical, thermal and dielectric properties of ternary mixture of E7/6CB/6BA liquid crystal mixture complex. Optik, 187, 223-229.
- Eskalen, H., & Özğan, Ş. (2014). Altın Nanoparçacıklarla Katkılandırılan Nematik Sıvı Kristallerin İncelenmesi. Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 2(2), 407-414.
- Eskalen, H., Özğan, Ş., Alver, Ü., & Kerli, S. (2015). Electro-Optical Properties of Liquid Crystals Composite with Zinc Oxide Nanoparticles. Acta Physica Polonica, A., 127(3).
- Eskalen, H., Özğan, Ş., Okumuş, M., & Kerl, S. (2019). Thermal and Electro-optical Properties of Graphene Oxide/Dye-Doped Nematic Liquid Crystal. Brazilian Journal of Physics, 49(3), 341-347.
- Gupta, R. K., & Kumar, S. (2019). Effect of functionalised silver nanoparticle on the elastic constants and ionic transport of a nematic liquid crystal. Liquid Crystals, 1-9.
Details
Primary Language
English
Subjects
Wearable Materials
Journal Section
Research Article
Publication Date
November 29, 2019
Submission Date
July 23, 2019
Acceptance Date
October 14, 2019
Published in Issue
Year 1970 Volume: 22