2009/04/29 by Stavros D. Peroukidis, Panagiota K. Karahaliou, Alexandros G. Vanakaras +2
Biochemistry, Genetics and Molecular Biology · Materials Science · Physics and Astronomy · #Liquid Crystal Research Advancements #Photonic Crystals and Applications #Plant Reproductive Biology #cond-mat.mtrl-sci #cond-mat.soft #cond-mat.stat-mech
paper · pdf · doi:10.1080/02678290902814700
published as Liquid Crystals, 36(6&7), 727-737 (2009). · 15 pages 7 figures
arxiv created 2009/04/29 · openalex publication_date 2009/06/29 · arxiv updated 2010/04/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/29
We studied the symmetry and spatial uniformity of the orientational order of the biaxial nematic phase in the light of recent experimental observations of phase biaxiality in thermotropic bent-core and calamitic-tetramer nematics. Evidence is presented supporting monoclinic symmetry, instead of the usually assumed orthorhombic symmetry. The use of deuterium nuclear magnetic resonance to differentiate between the possible symmetries is described. The spatial aspects of biaxial order are presented in the context of the cluster model, wherein macroscopic biaxiality can result from the field-induced alignment of biaxial and possibly polar domains. The implications of different symmetries on the alignment of biaxial nematics and on the measurements of biaxial order are discussed in conjunction with the microdomain structure of the biaxial phase.