Journal ArticleDOI
Stable Amorphous Blue Phase of Bent-Core Nematic Liquid Crystals Doped with a Chiral Material
Stefanie Taushanoff,Khoa V. Le,Jarrod Williams,Robert J. Twieg,B. K. Sadashiva,Hideo Takezoe,Antal Jakli +6 more
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TLDR
In this article, the blue phase III (BPIII) was induced at a relatively low and wide (over 20 °C) temperature range in nematogenic achiral bent-core liquid crystals doped with a high twisting power chiral material.Abstract:
We report an induction of the blue phase III (BPIII) at a relatively low and wide (over 20 °C) temperature range in nematogenic achiral bent-core liquid crystals doped with a high twisting power chiral material. The pitch decreases with increasing chiral dopant ratio, and easily reaches the ultraviolet wavelength, so that completely dark texture is obtained under crossed polarizers. Electrooptical switching was achieved in a time range of a few to a few tens of milliseconds. We propose for the stabilization of BPIII that broad-temperature range smectic nano-clusters inhibit the long-range order of the double twisted helical structures, and also inhibit possible separation of chiral dopants from the mixture.read more
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Liquid crystals of the twenty-first century – nematic phase of bent-core molecules
TL;DR: A comprehensive review of the main research directions and results can be found in this article, where the authors describe the properties of smectic nano clusters often observed in BCNs, and discuss rheological properties that reveal unusually large viscosities and small twist and bend elastic constants.
Journal ArticleDOI
Hysteresis-Free Blue Phase Liquid-Crystal-Stabilized by ZnS Nanoparticles
Ling Wang,Wanli He,Xia Xiao,Fanguo Meng,Yang Zhang,Pangyen Yang,Liping Wang,Jiumei Xiao,Huai Yang,Huai Yang,Yunfeng Lu,Yunfeng Lu +11 more
Journal ArticleDOI
Physics of liquid crystals of bent-shaped molecules
Journal ArticleDOI
Asymmetric Tunable Photonic Bandgaps in Self-Organized 3D Nanostructure of Polymer-Stabilized Blue Phase I Modulated by Voltage Polarity
Meng Wang,Cheng Zou,Jian Sun,Lanying Zhang,Ling Wang,Ling Wang,Jiumei Xiao,Fasheng Li,Ping Song,Huai Yang +9 more
TL;DR: In this article, a polymer-stabilized blue phase (PSBP) I film with the self-organized 3D nanostructure is fabricated, and an electrically tunable photonic bandgap (PBG) is achieved.
Journal ArticleDOI
Liquid crystalline blue phase I observed for a bent-core molecule and its electro-optical performance
TL;DR: In this paper, the liquid crystalline blue phase I (BP I) was observed for a nematogenic achiral bent-core molecule doped with a small percentage of a chiral additive with a high twisting power.
References
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Journal ArticleDOI
Polymer-stabilized liquid crystal blue phases
Hirotsugu Kikuchi,Hirotsugu Kikuchi,Masayuki Yokota,Yoshiaki Hisakado,Huai Yang,Tisato Kajiyama +5 more
TL;DR: This work shows the stabilization of blue phases over a temperature range of more than 60 K including room temperature (260–326 K), and demonstrates an electro-optical switching with a response time of the order of 10−4 s for the stabilized blue phases at room temperature.
Journal ArticleDOI
Bent-Core Liquid Crystals: Their Mysterious and Attractive World
Hideo Takezoe,Yoichi Takanishi +1 more
TL;DR: In this article, structural and properties of liquid crystalline phases formed by bent-core molecules are reviewed and the most attractive properties of this new class of liquid crystals are in polarity and chirality, despite being formed from achiral molecules.
Journal ArticleDOI
Liquid crystal ‘blue phases’ with a wide temperature range
TL;DR: It is proposed that the unusual behaviour of these blue phase materials is due to their dimeric molecular structure and their very high flexoelectric coefficients, which sets out new theoretical challenges and potentially opens up new photonic applications.
Journal ArticleDOI
Nematic phases of bent-core mesogens
TL;DR: In this article, a temperature dependent stepwise transition from cybotactic nematic phases to different types of non-polar and tilted smectic phases (SmC(I) and SmC(II)) is observed with a mesophase composed of elongated, but not yet fused cybactic clusters (CybC) as an intermediate state of this transition.
Journal ArticleDOI
Ferroelectric Response and Induced Biaxiality in the Nematic Phase of a Bent-Core Mesogen
Oriano Francescangeli,Vesna Stanic,Sofia I. Torgova,Alfredo Strigazzi,Nicola Scaramuzza,Claudio Ferrero,Igor P. Dolbnya,Igor P. Dolbnya,Thomas M. Weiss,Thomas M. Weiss,Roberto Berardi,Luca Muccioli,Silvia Orlandi,Claudio Zannoni +13 more
TL;DR: In this article, experimental evidence of a ferroelectric response to a switching electric field in a nematic liquid crystal is reported and connected with field-induced biaxiality, and it is concluded that the response is due to fieldinduced reorganization of polar cybotactic groups within the nematic phase.