The influence of graphene nanoplatelets on the Freedericksz transition threshold in nematic liquid crystals

Cristina Cirtoaje; Emil Petrescu

doi:10.1117/12.2502581

31 December 2018 The influence of graphene nanoplatelets on the Freedericksz transition threshold in nematic liquid crystals

Cristina Cirtoaje, Emil Petrescu

Author Affiliations +

Proceedings Volume 10977, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IX; 109770J (2018) https://doi.org/10.1117/12.2502581
Event: Advanced Topics in Optoelectronics, Microelectronics and Nanotechnologies IX, 2018, Constanta, Romania

Abstract

The paper is concentrated on the study of basic properties of a nematic liquid crystal mixture with graphene nanoplatelets (GP). This analysis might provide valuable information about the anchoring forces of molecules on graphene surface and the possibility to control the alignment angle by GP concentration and the applied voltage. Freedericksz transition threshold was determined from the voltage dependence of the light intensity through the sample placed between crossed polarizers. The results indicated a decrease of the critical voltage when low amounts of graphene was added into the mixture (0.2%). For higher graphene concentration (0.9%), a different behavior of the mixture is observed suggesting a nanoplatelets clustering.

Citation Download Citation

Cristina Cirtoaje and Emil Petrescu "The influence of graphene nanoplatelets on the Freedericksz transition threshold in nematic liquid crystals", Proc. SPIE 10977, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IX, 109770J (31 December 2018); https://doi.org/10.1117/12.2502581

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