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Dielectric properties of N-SmC* liquid crystalline composite

N. YILMAZ CANLI1,* , F. YAKUPHANOGLU2, O. YASA3, B. BILGIN-ERAN3

Affiliation

  1. Yildiz Technical University, Department of Physics, 34210 Istanbul, Turkey
  2. Firat University, Department of Physics, 23169 Elazığ, Turkey
  3. Yildiz Technical University, Department of Chemistry, 34210 Istanbul, Turkey

Abstract

The dielectric relaxation and anisotropy properties of 4-cyano-4'-pentylbiphenyl and salicylaldimine compound (LC1) liquid crystals have been investigated. The polarizing microscopy and differential scanning calorimetry results show that the chiral salicylaldimine compound (LC1) exhibits enantiotropic SmC* mesophases. The dielectric anisotropy of the liquid crystals changes from positive type to negative type. The critical frequency values of dielectrical anisotropy for 4-cyano-4'- pentylbiphenyl and salicylaldimine compound (LC1) were found to be 693.84 and 577.61 kHz, respectively. The dielectric anisotropy value of 5CB/LC1 liquid crystal composite is lower than 5CB liquid crystal. It is evaluated that the 5CB/LC1 composite liquid crystal gives new dielectrical anisotropy and electrical properties.

Keywords

Liquid crystal, Dielectric anisotropy, Electrical properties.

Citation

N. YILMAZ CANLI, F. YAKUPHANOGLU, O. YASA, B. BILGIN-ERAN, Dielectric properties of N-SmC* liquid crystalline composite, Optoelectronics and Advanced Materials - Rapid Communications, 4, 6, June 2010, pp.821-827 (2010).

Submitted at: May 27, 2010

Accepted at: June 16, 2010