Optical, electro-optical, electrical and dielectric characterization of nematic liquid crystal (E7) layers doped with graphene nanoparticles for electro-optics

Y. G. Marinov*, G. B. Hadjichristov, P. M. Rafailov, Shiuan-Huei Lin, V. M. Marinova, A. G. Petrov

*此作品的通信作者

研究成果: Conference article同行評審

1 引文 斯高帕斯(Scopus)

摘要

Thin (7 μm) layers of nanocomposites from graphene nanoflakes (GrFs) dispersed at concentrations of 10-3 wt.% into the nematic liquid crystal (NLC) E7 were characterized by various investigation techniques, such as Raman spectroscopy, impedance measurements and dielectric spectroscopy, as well as by electro-optical measurements (optical transmittance of the NLC layers versus the voltage of the applied external AC electric field). Conducting behaviour, dielectric permittivity and electric energy loss of our planar-aligned NLC layers at room temperature were analysed as a function of frequency in the range from 0.5 Hz to 1 MHz. The analysis of experimental data indicates that the molecular alignment through GrFs/NLC surface interactions is responsible for the reduction of the ionic conductivity of E7 NLC in the presence of GrFs. As compared to pure LC E7, this leads to improved characteristics for the studied nanocomposites, necessary in their practical applications in electro-optics.

原文English
文章編號012031
期刊Journal of Physics: Conference Series
1186
發行號1
DOIs
出版狀態Published - 1 1月 2019
事件20th Jubilee International School on Condensed Matter Physics: Physics and Applications of Advanced and Multifunctional Materials, ISCMP 2018 - Varna, Bulgaria
持續時間: 3 9月 20187 9月 2018

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