Abstract
We present small-angle X-ray scattering, polarized optical microscopy and electric current measurements of a sulfur-containing bent-core liquid crystal material for characterization of the layer and director structures, thermally and electrically driven transitions between antiferroelectric and ferroelectric structures and switching properties. It was found that the material has polarization-modulated homochiral synclinic ferroelectric (SmCsPFmod), homochiral anticlinic antiferroelectric (SmCaPA) and racemic synclininc antiferroelectric (SmCsPA) structures that can be reversibly switched between each other either thermally and/or electrically. High switching polarization combined with softness of the liquid crystalline structure makes this compound a good candidate for applications in high-power capacitors and electrocaloric devices.
Highlights
Recent advances in wearable electronic devices drive the development of miniature chemical and electric sensors and miniature power and information storage devices
The gap between batteries and capacitors has been partially bridged with super-capacitors, which are currently being utilized in power conditioning and electric transportation, they still have an order of magnitude smaller energy densities than batteries and take longer time to charge and discharge than conventional capacitors [7,8,9]
[19] as ourthe switching time sulfur containing bent-core liquid crystal was found that material hasmeasurements polarizationindicated above, while the minority outside orange area(SmC
Summary
Recent advances in wearable electronic devices drive the development of miniature chemical and electric sensors and miniature power and information storage devices. Electrical energy can be stored either electro-chemically in batteries or electro-statically in capacitors. The gap between batteries and capacitors has been partially bridged with super-capacitors, which are currently being utilized in power conditioning and electric transportation, they still have an order of magnitude smaller energy densities than batteries and take longer time to charge and discharge than conventional capacitors [7,8,9]. Capacitors made of antiferroelectric materials that undergo a reversible thermal or electric-field-induced transition to a ferroelectric state have the potential to store as much energy as electrochemical capacitors while maintaining the advantages of traditional capacitors [10,11]
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