Ferroelectric columnar liquid crystal featuring confined polar groups within core-shell architecture |
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Authors: | Miyajima Daigo Araoka Fumito Takezoe Hideo Kim Jungeun Kato Kenichi Takata Masaki Aida Takuzo |
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Affiliation: | Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Tokyo, Japan. |
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Abstract: | Ferroelectric liquid crystals are materials that have a remnant and electrically invertible polar order. Columnar liquid crystals with a ferroelectric nature have potential use in ultrahigh-density memory devices, if electrical polarization occurs along the columnar axis. However, columnar liquid crystals having an axial nonzero polarization at zero electric field and its electrical invertibility have not been demonstrated. Here, we report a ferroelectric response for a columnar liquid crystal adopting a core-shell architecture that accommodates an array of polar cyano groups confined by a hydrogen-bonded amide network with an optimal strength. Under an applied electric field, both columns and core cyano groups align unidirectionally, thereby developing an extremely large macroscopic remnant polarization. |
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