Undulations of smectic a layers in achiral liquid crystals manifested as stripe textures

0580171 - FZÚ 2024 RIV US eng J - Journal Article
Podoliak, Natalia - Salamon, P. - Lejček, Lubor - Kužel, Petr - Novotná, Vladimíra
Undulations of smectic a layers in achiral liquid crystals manifested as stripe textures.
Physical Review Letters. Roč. 131, č. 22 (2023), č. článku 228101. ISSN 0031-9007. E-ISSN 1079-7114
R&D Projects: GA MŠMT(CZ) 8I23001
Institutional support: RVO:68378271
Keywords : achiral coumpounds * thermal tratment * light diffraction experiments * stripe formation
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 8.6, year: 2022
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevLett.131.228101

Self-assembly of organic molecules represents a fascinating playground to create various liquid crystalline (LC) nanostructures. In this work, we study layer undulations on micrometer scale in smectic A phases for achiral compounds, experimentally demonstrated as regular stripe patterns induced by thermal treatment. Undulations including their anharmonic properties are evaluated by means of polarimetric imaging and light diffraction experiments in cells with various thicknesses. The key role in stripe formation is played by high negative values of the thermal expansion coefficient.

Permanent Link: https://hdl.handle.net/11104/0348932