Heliconical-layered nanocylinders (HLNCs) – hierarchical self-assembly in a unique B4 phase liquid crystal morphology

Heliconical-layered nanocylinders (HLNCs) – hierarchical self-assembly in a unique B4 phase liquid crystal morphology
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螺旋层状纳米圆柱 (HLNC) — 独特的 B4 相液晶形态的分层自组装

DOI:
10.1039/c9mh00089e
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发表时间:
2019
期刊:
影响因子:
13.3
通讯作者:
Zhu, Chenhui
Zhu, Chenhui
中科院分区:
材料科学1区
文献类型:
--
作者:
Shadpour, Sasan;Nemati, Ahlam;Boyd, Nicola Jane;Li, Lin;Prévôt, Marianne Estelle;Wakerlin, Samantha L.;Vanegas, Julie P.;Salamończyk, Mirosław;Hegmann, Elda;Zhu, Chenhui

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发现一类在分子的较长对位侧具有单个手性侧链的三联苯双核液晶分子具有形成B4相的双核液晶的独特形态。与形成螺旋纳米丝或微丝B4相的具有两个手性侧链或在较短间位侧中具有手性侧链的母体分子不同,本文所述的两种衍生物形成由多达10个同轴螺旋层组成的螺旋层状纳米圆柱体,其可以分裂或合并、编织和自组装成多种模式,包括羽毛或人字形结构、同心环、或中空的鸟巢状上层建筑。这些多层次的自组装结构,与肌肉纤维相媲美,显示蓝色的结构颜色,并显示出巨大的结构和形态复杂性。
A unique morphology for bent-core liquid crystals forming the B4 phase has been found for a class of tris-biphenyl bent-core liquid crystal molecules with a single chiral side chain in the longer para-side of the molecule. Unlike the parent molecules with two chiral side chains or a chiral side chain in the shorter meta-side, which form helical nano- or microfilament B4 phases, the two derivatives described here form heliconical-layered nanocylinders composed of up to 10 coaxial heliconical layers, which can split or merge, braid, and self-assemble into a variety of modes including feather- or herringbone-type structures, concentric rings, or hollow nest-like superstructures. These multi-level hierarchical self-assembled structures, rivaling muscle fibers, display blue structural color and show immense structural and morphological complexity.
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