Document Type

Article

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Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence

Publication Details

Molecular Crystals and Liquid Crystals

Abstract

We report the observation of biaxial nematic phase in a bent-core molecular system in which the biaxiality exists on a microscopic scale using polarizing microscopy, electro-optics and dielectric spectroscopy. An application of electric field induces a macroscopic biaxiality and therefore electro-optic switching. The observed electro-optic switching is explained in terms of the interaction of the ferroelectric clusters with the electric field. Dielectric spectra of the sample shows existence of low-frequency collective processes related to the microscopic polar clusters. The dielectric constant changes its sign from positive to negative and again to positive values.

DOI

10.1080/15421406.2011.568335

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