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Dielectric and AC electrical conductivity characteristics of liquid crystal doped with graphene

Published online by Cambridge University Press:  12 December 2012

Muharrem Gökçen ,
Mert Yıldırım  and
Oğuz Köysal
Muharrem Gökçen*
Affiliation:
Department of Physics, Faculty of Arts and Sciences, Düzce University, 81620 Düzce, Turkey
Mert Yıldırım
Affiliation:
Department of Physics, Faculty of Arts and Sciences, Düzce University, 81620 Düzce, Turkey
Oğuz Köysal
Affiliation:
Department of Physics, Faculty of Arts and Sciences, Düzce University, 81620 Düzce, Turkey
*
ae-mail: muharremgokcen@duzce.edu.tr
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Abstract

The dielectric response of the liquid crystal (LC) and LC doped with graphene was studied by using dielectric spectroscopy technique in the frequency range of 100 kHz to 10 MHz at room temperature. The LC material used in this experiment was E7 and the concentration of doping material graphene was acquired as 0.05 wt.% in E7. Dielectric constant (ε'), dielectric loss (ε"), dielectric loss tangent (tan δ) and AC conductivity of pure LC and graphene-doped LC mixture were also calculated. Results showed that all dielectric parameters are strong functions of frequency and applied bias voltage. Also, it was found that doping LC with graphene strongly influenced threshold voltage.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 60 , Issue 3 , December 2012 , 30104
Copyright
© EDP Sciences, 2012

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