Fluid Layered Ferroelectrics with Global C∞v Symmetry
Abstract Ferroelectricity in fluid materials, which allows free rotation of molecules, is an unusual phenomenon raising cutting‐edge questions in science. Conventional ferroelectric liquid crystals have been found in phases with low symmetry that permit the presence of spontaneous polarization. Rece...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-09-01
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| Series: | Advanced Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/advs.202202048 |
| _version_ | 1797817500667215872 |
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| author | Hirotsugu Kikuchi Hiroyuki Matsukizono Koki Iwamatsu Sota Endo Shizuka Anan Yasushi Okumura |
| author_facet | Hirotsugu Kikuchi Hiroyuki Matsukizono Koki Iwamatsu Sota Endo Shizuka Anan Yasushi Okumura |
| author_sort | Hirotsugu Kikuchi |
| collection | DOAJ |
| description | Abstract Ferroelectricity in fluid materials, which allows free rotation of molecules, is an unusual phenomenon raising cutting‐edge questions in science. Conventional ferroelectric liquid crystals have been found in phases with low symmetry that permit the presence of spontaneous polarization. Recently, the discovery of ferroelectricity with high symmetry in the nematic phase has attracted considerable attention. However, the physical mechanism and molecular origin of ferroelectricity are poorly understood and a large domain of macroscopically oriented spontaneous polarization is difficult to fabricate in the ferroelectric nematic phase. This study reports new fluid layered ferroelectrics with the C∞v symmetry in which nearly complete orientation of the spontaneous polarization remains stable under zero electric field without any orientation treatment. These ferroelectrics are obtained by simplifying the molecular structure of a compound with a known ferroelectric nematic phase, although the simplification reduced the dipole moment. The results provide useful insights into the mechanism of ferroelectricity due to dipole–dipole interactions in molecular assemblies. The new ferroelectric materials are promising for a wide range of applications as soft ferroelectrics. |
| first_indexed | 2024-03-13T08:54:23Z |
| format | Article |
| id | doaj.art-79dcdea15cc44303b2a313732cb7e011 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-03-13T08:54:23Z |
| publishDate | 2022-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-79dcdea15cc44303b2a313732cb7e0112023-05-29T04:01:40ZengWileyAdvanced Science2198-38442022-09-01926n/an/a10.1002/advs.202202048Fluid Layered Ferroelectrics with Global C∞v SymmetryHirotsugu Kikuchi0Hiroyuki Matsukizono1Koki Iwamatsu2Sota Endo3Shizuka Anan4Yasushi Okumura5Kyushu University Institute for Materials Chemistry and Engineering 6‐1 Kasuga‐Koen Kasuga Fukuoka 816‐8580 JapanKyushu University Institute for Materials Chemistry and Engineering 6‐1 Kasuga‐Koen Kasuga Fukuoka 816‐8580 JapanKyushu University Interdisciplinary Graduate School of Engineering Sciences 6‐1 Kasuga‐Koen Kasuga Fukuoka 816‐8580 JapanKyushu University Interdisciplinary Graduate School of Engineering Sciences 6‐1 Kasuga‐Koen Kasuga Fukuoka 816‐8580 JapanKyushu University Institute for Materials Chemistry and Engineering 6‐1 Kasuga‐Koen Kasuga Fukuoka 816‐8580 JapanKyushu University Institute for Materials Chemistry and Engineering 6‐1 Kasuga‐Koen Kasuga Fukuoka 816‐8580 JapanAbstract Ferroelectricity in fluid materials, which allows free rotation of molecules, is an unusual phenomenon raising cutting‐edge questions in science. Conventional ferroelectric liquid crystals have been found in phases with low symmetry that permit the presence of spontaneous polarization. Recently, the discovery of ferroelectricity with high symmetry in the nematic phase has attracted considerable attention. However, the physical mechanism and molecular origin of ferroelectricity are poorly understood and a large domain of macroscopically oriented spontaneous polarization is difficult to fabricate in the ferroelectric nematic phase. This study reports new fluid layered ferroelectrics with the C∞v symmetry in which nearly complete orientation of the spontaneous polarization remains stable under zero electric field without any orientation treatment. These ferroelectrics are obtained by simplifying the molecular structure of a compound with a known ferroelectric nematic phase, although the simplification reduced the dipole moment. The results provide useful insights into the mechanism of ferroelectricity due to dipole–dipole interactions in molecular assemblies. The new ferroelectric materials are promising for a wide range of applications as soft ferroelectrics.https://doi.org/10.1002/advs.202202048ferroelectric liquid crystalsmemory effectsecond harmonic generationsmectic phases |
| spellingShingle | Hirotsugu Kikuchi Hiroyuki Matsukizono Koki Iwamatsu Sota Endo Shizuka Anan Yasushi Okumura Fluid Layered Ferroelectrics with Global C∞v Symmetry Advanced Science ferroelectric liquid crystals memory effect second harmonic generation smectic phases |
| title | Fluid Layered Ferroelectrics with Global C∞v Symmetry |
| title_full | Fluid Layered Ferroelectrics with Global C∞v Symmetry |
| title_fullStr | Fluid Layered Ferroelectrics with Global C∞v Symmetry |
| title_full_unstemmed | Fluid Layered Ferroelectrics with Global C∞v Symmetry |
| title_short | Fluid Layered Ferroelectrics with Global C∞v Symmetry |
| title_sort | fluid layered ferroelectrics with global c∞v symmetry |
| topic | ferroelectric liquid crystals memory effect second harmonic generation smectic phases |
| url | https://doi.org/10.1002/advs.202202048 |
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