Bias dependent dielectric relaxation dynamics of electrically tuned large-scale aligned zinc oxide nanorods in nematic liquid crystal host

Nayek, P.; Ghosh, S.; Karan, S.; Majumder, T. Pal; Roy, S. K.
September 2008
Applied Physics Letters;9/15/2008, Vol. 93 Issue 11, p112905
Academic Journal
It was observed that mixed ZnO nanorods and twisted nematic liquid crystals (LCs) show highly ordered molecular system. The observed molecular relaxation arose due to a reorientation of long molecular axis of the order of 400 kHz for pure ZLI-1636, while such relaxation was shifted to a lower frequency for mixture. By using the proposed equations, f=fDB-α exp[-EV/(B-BC)] and σ=σDB-sα exp[-sEV/(B-BC)], the obtained equivalent activation energy was increased remarkably by the introduction of ZnO nanorods in pure LC. A strong long-range interaction is established in 0.01% ZnO nanorods mixed LC system.


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