1. Emergent Ferroelectric Nematic and Heliconical Ferroelectric Nematic States in an Achiral "Straight" Polar Rod Mesogen.
- Author
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Nishikawa H, Okada D, Kwaria D, Nihonyanagi A, Kuwayama M, Hoshino M, and Araoka F
- Abstract
Ferroelectric nematic liquid crystals (N
F LCs) are distinguished by their remarkable polarization characteristics and diverse physical phenomena, sparking significant interest and excitement within the scientific community. To date, over 150 NF LC molecules are developed; however, there are no reports regarding straight linear polar molecules with a parallel alignment of the permanent dipole moment and the molecular axis. The straight polar mesogen nBOE exhibits an enantiotropic NF phase with a wide temperature window (up to 100 K) despite having a longer alkyl chain (up to n = 6) than the critical alkyl chain length of conventional models. Interestingly, nBOE with a medium-length alkyl chain displays an exotic phase sequence of NF -HC NF -SmXF during the elimination of positional displacement among adjacent molecules. Furthermore, the reflective color modulation of theHC NF LC over the entire VIS-NIR spectral regime by ultralow E-field (up to 0.14 V µm-1 ) is demonstrated., (© 2024 The Author(s). Advanced Science published by Wiley‐VCH GmbH.)- Published
- 2024
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