Year 2019, Volume 22 , Issue , Pages 34 - 40 2019-11-29

BAZI NEMATİK SIVI KRİSTALİN ELEKTRİK ÖZELLİKLERİNİN GERİLİME BAGLILIĞI
VOLTAGE DEPENDENCE OF SOME NEMATIC LIQUID CRYSTALS’ ELECTRIC PROPERTIES

Şükrü Özgan [1] , Hasan Eskalen [2]


Nematik sıvı kristaller, gösterge sistemleri üretiminde ve birçok teknolojik uygulamalarda çok önemli malzemelerdir. Nematik sıvı kristallerin fiziksel ve elektriksel özelliklerinin araştırılması gerekir. 6CB, 8CB ve E7 nematik sıvı kristallerin empedans, modül ve kayıp tanjantı, oda sıcaklığında ve 1 kHz frekansında,  0-20V DC volt aralığında gerilime bağlı olarak incelenmiştir. 6CB ve 8CB numunelerin gerçek elektrik modülü gerilimdeki artıştan dolayı küçük bir artış gösterir ve 8CB gerçek modül değerleri 6CB gerçek modül değerlerinden daha büyüktür. E7'nin gerçek modülü yaklaşık 7 voltta bir düşüşe sahiptir ve yüksek voltajlarda küçüktür. Numunelerin sanal elektrik modülü voltaj artışı ile azalır. 6CB ve 8CB numunelerin kayıp tanjant değerleri, belirli bir voltaj değerinden sonra azalmaktadır. 6CB ve 8CB numunelerin mutlak empedansı dalgalı davranışa sahiptir ve E7 nin mutlak empedans değeri bütün voltaj değerlerinde sıfıra yaklaşmaktadır.

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.

 

  • 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.
  • Lee, W., Gau, J.-S., & Chen, H.-Y. (2005). Electro-optical properties of planar nematic cells impregnated with carbon nanosolids. Applied Physics B, 81(2-3), 171-175. Mahalingam, T., Venkatachalam, T., Jayaprakasam, R., & Vijayakumar, V. (2016). Optical, thermal studies on binary and ternary hydrogen-bonded liquid crystal complexes. Brazilian Journal of Physics, 46(3), 273-281.
  • Matharu, A. S., Jeeva, S., & Ramanujam, P. (2007). Liquid crystals for holographic optical data storage. Chemical Society Reviews, 36(12), 1868-1880.
  • Nafees, A., Kalita, G., & Sinha, A. (2019). Effect of titanium dioxide nanoparticles on the dielectric and electro-optical properties of bent-core liquid crystals. Journal of Molecular Liquids, 274, 592-597.
  • Nimmy, J. V., Cherumannil Karumuthil, S., & Varghese, S. (2019). Nano P (VDF-TrFE) doped polyimide alignment layers for twisted nematic liquid crystal devices. Liquid Crystals, 1-6.
  • Okumus, M. (2013). Investigation of the phase transition and absorption properties of liquid crystal hexylcyanobiphenyl/octylcyanobiphenyl mixtures. Asian Journal of Chemistry, 25(7), 3879. Okumuş, M., Eskalen, H., Sünkür, M., & Özğan, Ş. (2019). Mesogenic properties of PAA/6BA binary liquid crystal complexes. Journal of Molecular Structure, 1178, 428-435. Okumuş, M., Özğan, Ş., Kırık, İ., & Kerli, S. (2016). Thermal and optical characterization of liquid crystal 4′-hexyl-4-biphenylcarbonitrile/4-hexylbenzoic acid mixtures. Journal of Molecular Structure, 1120, 150-155. Okumuş, M., Özğan, Ş., & Yılmaz, S. (2014). Thermal and optical properties of some hydrogen-bonded liquid crystal mixtures. Brazilian Journal of Physics, 44(4), 326-333. Özğan, Ş. Investigating of dielectric anisotropy and birefringence of binary liquid crystal mixtures. International Journal of Chemistry and Technology, 1(1), 1-6.
  • Özğan, Ş., Eskalen, H., & Tapkıranlı, Y. (2018). Thermal and electro-optic properties of graphene oxide-doped hexylcyanobiphenyl liquid crystal. Journal of Theoretical and Applied Physics, 12(3), 169-176.
  • Özğan, S., & Keskin, M. (1995). A Theory of Melting of Molecular Crystals III. The Liquid Crystalline Phase. Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 270(1), 147-157.
  • Özğan, Ş., & Okumuş, M. (2011). Thermal and spectrophotometric analysis of liquid crystal 8CB/8OCB mixtures. Brazilian Journal of Physics, 41(2-3), 118.
  • Ozgan, S., Yazici, M., & Ates, K. (2011). Conductance and Dielectric Anisotropy Properties of 4'-Hexyl-4-biphenylcarbonitrile and 4'-Octyloxy-4-biphenylcarbonitrile Liquid Crystals and Their Composite. Asian Journal of Chemistry, 23(7), 3247-3251.
  • Sharma, A., Malik, P., Dhar, R., & Kumar, P. (2019). Improvement in electro-optical and dielectric characteristics of ZnO nanoparticles dispersed in a nematic liquid crystal mixture. Bulletin of Materials Science, 42(5), 215.
  • Shen, Y., & Dierking, I. (2019). Perspectives in Liquid-Crystal-Aided Nanotechnology and Nanoscience. Applied Sciences, 9(12), 2512. Shiju, E., Arun, R., Varma, M. R., Chandrasekharan, K., Sandhyarani, N., & Varghese, S. (2017). Effect of ferroelectric nanoparticles in the alignment layer of twisted nematic liquid crystal display. Optical Materials, 67, 7-13.
  • Vill, V. (1992). Early history of liquid crystalline compounds. Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 213(1), 67-71.
  • Wulf, A. (1976). Difficulties with the Maier–Saupe theory of liquid crystals. The Journal of Chemical Physics, 64(1), 104-109.
  • Ye, L., Liu, B., Li, F., Feng, Y., Cui, Y., & Lu, Y. (2016). The influence of Ag nanoparticles on random laser from dye-doped nematic liquid crystals. Laser Physics Letters, 13(10), 105001.
Primary Language en
Subjects Materials Science, Textiles
Journal Section Research Articles
Authors

Orcid: 0000-0001-9334-327X
Author: Şükrü Özgan (Primary Author)
Institution: Physics Department, Kahramanmaraş Sütçü İmam University, Kahramanmaraş, Turkey
Country: Turkey


Orcid: 0000-0002-4523-6573
Author: Hasan Eskalen
Institution: Physics Department, Kahramanmaraş Sütçü İmam University, Kahramanmaraş, Turkey
Country: Turkey


Dates

Application Date : July 23, 2019
Acceptance Date : October 14, 2019
Publication Date : November 29, 2019

Bibtex @research article { ksujes595785, journal = {Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi}, issn = {}, eissn = {1309-1751}, address = {}, publisher = {Kahramanmaras Sutcu Imam University}, year = {2019}, volume = {22}, pages = {34 - 40}, doi = {}, title = {VOLTAGE DEPENDENCE OF SOME NEMATIC LIQUID CRYSTALS’ ELECTRIC PROPERTIES}, key = {cite}, author = {Özgan, Şükrü and Eskalen, Hasan} }
APA Özgan, Ş , Eskalen, H . (2019). VOLTAGE DEPENDENCE OF SOME NEMATIC LIQUID CRYSTALS’ ELECTRIC PROPERTIES. Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi , 22 () , 34-40 . Retrieved from http://jes.ksu.edu.tr/en/issue/50210/595785
MLA Özgan, Ş , Eskalen, H . "VOLTAGE DEPENDENCE OF SOME NEMATIC LIQUID CRYSTALS’ ELECTRIC PROPERTIES". Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi 22 (2019 ): 34-40 <http://jes.ksu.edu.tr/en/issue/50210/595785>
Chicago Özgan, Ş , Eskalen, H . "VOLTAGE DEPENDENCE OF SOME NEMATIC LIQUID CRYSTALS’ ELECTRIC PROPERTIES". Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi 22 (2019 ): 34-40
RIS TY - JOUR T1 - VOLTAGE DEPENDENCE OF SOME NEMATIC LIQUID CRYSTALS’ ELECTRIC PROPERTIES AU - Şükrü Özgan , Hasan Eskalen Y1 - 2019 PY - 2019 N1 - DO - T2 - Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi JF - Journal JO - JOR SP - 34 EP - 40 VL - 22 IS - SN - -1309-1751 M3 - UR - Y2 - 2019 ER -
EndNote %0 Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi VOLTAGE DEPENDENCE OF SOME NEMATIC LIQUID CRYSTALS’ ELECTRIC PROPERTIES %A Şükrü Özgan , Hasan Eskalen %T VOLTAGE DEPENDENCE OF SOME NEMATIC LIQUID CRYSTALS’ ELECTRIC PROPERTIES %D 2019 %J Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi %P -1309-1751 %V 22 %N %R %U
ISNAD Özgan, Şükrü , Eskalen, Hasan . "VOLTAGE DEPENDENCE OF SOME NEMATIC LIQUID CRYSTALS’ ELECTRIC PROPERTIES". Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi 22 / (November 2019): 34-40 .
AMA Özgan Ş , Eskalen H . VOLTAGE DEPENDENCE OF SOME NEMATIC LIQUID CRYSTALS’ ELECTRIC PROPERTIES. KSU J. Eng. Sci.. 2019; 22: 34-40.
Vancouver Özgan Ş , Eskalen H . VOLTAGE DEPENDENCE OF SOME NEMATIC LIQUID CRYSTALS’ ELECTRIC PROPERTIES. Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi. 2019; 22: 40-34.