Isotropic to Nematic Phase Transition in Carbon Nanotube dispersed Liquid Crystal Composites

Details Isotropic to Nematic Phase Transition in Carbon Nanotube dispersed Liquid Crystal Composites Isotropic to Nematic Phase Transition in Carbon Nanotube dispersed Liquid Crystal Composites

2009-05-18

arxiv.org/abs/0905.2779v1

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 4 figures

Scientific paper

A high-resolution dielectric and calorimetric study of the isotropic (I) to nematic (N) phase transition of carbon nanotube (CNT) dispersed liquid crystal (LC) functional composites as a function of CNT concentration is reported. The evolution of the I-N phase transition, the temperature dependence of local nematic ordering formed by dispersed CNTs in the LC media and the transition enthalpy were coherently monitored. Anisotropic CNTs induce local deformation to the nematic director of LC and form lyotropic pseudo-nematic phase in the LC media. Results clearly indicate the dramatic impact of dispersed CNTs on both the isotropic and nematic phases of the composite.

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