Ferroelectrically Switchable Axial Polarization in Columnar Liquid Crystalline Phases. Issue 31 (31st January 2020)

• Record Type: Journal Article
• Authors: Nguyen, Manh Linh; Cho, Byoung‐Ki
• Is Part Of: Chemistry. Volume 26:Issue 31(2020)
• Page Start: 6964
• Page End: 6975
• Publication Date: 2020-01-31
• Subjects: axial polarization -- columnar -- electric field -- ferroelectric -- liquid crystals; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201904884
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Recently, ferroelectrically switchable columnar LCs have drawn a great deal of attention for their generation of rich polarization domains. Because of their unique dielectric and self‐assembly properties, they are considered to be a promising material for the design of sensors and ultra‐high memory devices. Herein, ferroelectrically switchable LCs by using ester, amide, and 1, 2, 3‐triazole groups are reviewed. Most of them do not exhibit genuine ferroelectricity owing to the low energy barrier between the two polar states. The intermolecular interactions between polar groups strongly affect the switchability and stability of polarization. Therefore, it is challenging to balance these two competing factors to improve the ferroelectric function in columnar LCs. Overall, additional effort, including LC design and device fabrication, should be made to optimize the material performance for practical applications in the future. Abstract : Up and down : The axial polarization formed by the one‐dimensional stacking of polar groups can be ferroelectrically switched in response to an electric field, if its stability and dynamics are exquisitely balanced. This minireview presents an overview of ferroelectrically switchable columnar liquid crystals in terms of polar group design.