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Polar Switching in a Lyotropic Columnar Nematic Liquid Crystal Made of Bowl‐Shaped Molecules
Author(s) -
Guilleme Julia,
Cavero Emma,
Sierra Teresa,
Ortega Josu,
Folcia César L.,
Etxebarria Jesus,
Torres Tomás,
GonzálezRodríguez David
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201500238
Subject(s) - liquid crystal , materials science , polar , dipole , lyotropic , biaxial nematic , polarization (electrochemistry) , condensed matter physics , electric field , optics , optoelectronics , physics , liquid crystalline , organic chemistry , chemistry , quantum mechanics , astronomy
A polar response in a lyotropic columnar nematic material is reported. The material accommodates bowl‐shaped molecules with strong axial dipole moments in column segments without head‐to‐tail invariance. Optical second‐harmonic‐generation methods confirm that the nematic columns align unidirectionally under an applied electric field and the material develops remnant macroscopic polarization observable for hours. The switching takes place by a flip of the columns.