Mechanism of electrooptic switching time enhancement in ferroelectric liquid crystal/gold nanoparticles dispersion |
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| Authors: | F V Podgornov M Gavrilyak A Karaawi V Boronin W Haase |
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| Institution: | 1. Eduard-Zintl-Institute for Inorganic and Physical Chemistry, Technical University of Darmstadt, Darmstadt, Germany;2. Laboratory of Molecular Electronics, Institute of Natural and Exact Sciences, South Ural State University, Chelyabinsk, Russia;3. Laboratory of Molecular Electronics, Institute of Natural and Exact Sciences, South Ural State University, Chelyabinsk, Russia |
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| Abstract: | It is well established that incorporation of nanoparticles (NPs) in the structure of ferroelectric liquid crystals (FLCs) leads to a decrease in their electrooptic response time. Several approaches have been suggested to explain this effect (decrease in rotational viscosity of FLCs, ions enhanced localised electric field, dipole–dipole interaction among NPs and FLC molecules, FLC ordering). In this article, we will report the role of the voltage divider formed by the structural elements of a FLC cell based on ferroelectric liquid crystal/gold nanospheres (FLC/GNSs) dispersion in enhancement of the switching time. Using the impedance spectroscopic measurements, it was demonstrated that the dispersing of GNSs leads to the increase in the voltage drop on FLC/GNSs layer in comparison with the pristine FLC one. Consequently, the electrooptic response time of the FLC/GNSs cell is faster than that of the pristine one. However, the rotational viscosity of the FLC does not depend on the presence of the GNSs. |
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| Keywords: | Ferroelectric liquid crystals gold nanoparticles equivalent electric circuit rotational viscosity response time |
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