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Orientational coupling amplification in ferroelectric nematic colloids

By F. Li, O. Buchnev, C.I. Cheon, A. Glushchenko, V. Reshetnyak, Y. Reznikov, T.J. Sluckin and J.L West

Abstract

We investigated the physical properties of low concentration ferroelectric nematic colloids, using calorimetry, optical methods, infra-red spectroscopy and capacitance studies. The resulting homogeneous colloids possess a significantly amplified nematic orientational coupling. We find that the nematic orientation coupling increases by ~10% for particle concentrations of 0.2%. A manifestation of the increased orientational order is that the clearing temperature of a nematic colloid increases by up to 40°C compared to the pure liquid crystal host. A theoretical model is proposed in which the ferroelectric particles induce local dipoles whose effective interaction is proportional to the square of the orientational order parameter

Topics: QD, QC
Year: 2006
OAI identifier: oai:eprints.soton.ac.uk:42471
Provided by: e-Prints Soton

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