2015/09/06 by Z. Ahmed, Ahmed, Z., C. Welch +5
Computer Science · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Liquid Crystal Research Advancements #Micro and Nano Robotics #Nonlinear Dynamics and Pattern Formation #Soft Condensed Matter (cond-mat.soft) #cond-mat.soft
paper · pdf · doi:10.48550/arxiv.1509.01820
arxiv created 2015/09/06 · openalex publication_date 2015/09/06 · arxiv updated 2015/09/08 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
A series of non-symmetric dimers were synthesised containing either cyanobiphenyl or difluoroterphenyl moieties on one side and a range of long, short, bent, polar or apolar mesogens on the other side of the molecules. The dielectric anisotropy of the mesogens was varied systematically. The systems were characterised by differential scanning calorimetry (DSC), optical polarizing microscopy (OPM) and detailed X-ray diffraction (XRD) studies, both in the nematic and the Nx phase. The results are compared and structure properties relationships are discussed. A model for the assembly in the Nx phase is developed discussing Ntb structures, coaxial helices, swiss roll structures and chiral domain formation.