8-9th August, 2008 School of Materials Science & Nanotechnology,Jadavpur University
Bias dependent dielectric relaxation dynamics of electrically tuned large-scale aligned zinc oxide nanorods in nematic liquid crystal host
P. Nayek,1 S. Ghosh,1 S. Karan,1 T. Pal Majumder,2 and S. K. Roy1, a)
1Department of Spectroscopy, Indian Association for the Cultivation of Science, Jadavpur, Kolkata – 700032, India
2Department of Physics, University of Kalyani, Kalyani 741235, West Bengal, India
Abstract
It was observed that mixed ZnO nanorods and twisted nematic (TN) liquid crystals (LC) show highly ordered molecular system. The observed molecular relaxation arose due to 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 equation, )exp(CVDBBEBff−−=−αand )exp(CVsDBBsEB−−=−ασσ, the obtained equivalent activation energy was increased remarkably by the introduction of ZnO nanorods in pure LC and a strong long range interaction is established in 0.01% ZnO nanorods mixed LC system.
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