Electro-optical and dielectric properties of polymer-stabilized blue phase liquid crystal impregnated with a fluorine-containing compound
| Autor: | Natalya V. Rudakova, Wei Lee, Victor Ya. Zyryanov, Po Chang Wu, Ivan V. Timofeev, Hsin Li Chen |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
chemistry.chemical_classification Materials science Analytical chemistry Ionic bonding 02 engineering and technology Dielectric Polymer 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Dielectric spectroscopy Photopolymer chemistry Liquid crystal Phase (matter) Electric field 0103 physical sciences Materials Chemistry Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy |
| Zdroj: | Journal of Molecular Liquids. 267:138-143 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2017.12.062 |
| Popis: | The effects of a fluorine-containing compound (4,4′-difluorobenzophenone; DF) on the electro-optical and dielectric properties of polymer-stabilized blue phase (PSBP) liquid crystals were investigated. When a PSBP cell was driven by an in-plane electric field, the addition of DF up to 2.7 wt% effectively reduced the operation voltage by ~ 30%. Further inspection by dielectric spectroscopy indicated that the ionic concentration in PSBP decreased with increasing loading of DF. This finding can be ascribed to the complexation of impurity ions near the ketone group and carbon–fluorine bonds of the DF compound that restrained the ion transport after photopolymerization. As a result, the DF compound can be regarded as a superior ion-suppressor, enabling the reduction in the ionic effect and, in turn, the promotion of the electro-optical response of a PSBP. |
| Databáze: | OpenAIRE |
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