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Large Area Self-Assembly of Nematic Liquid-Crystal-Functionalized Gold Nanorods

机译:向列型液晶功能金纳米棒的大面积自组装

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摘要

Fascinating nematic- and smectic-like self-assembled arrays are observed for gold nanorods partially capped with either laterally or terminally attached nematic liquid crystals upon slow evaporation of an organic solvent on TEM grids. These arrays can be manipulated and reoriented by applying an external magnetic field from quasi-planar to vertical similar to a Freedericksz transition of common organic nematic liquid crystals. Birefringence and thin film textures of these self-assembled gold nanorod arrays observed by polarized optical microscopy are strongly reminiscent of common organic nematic liquid crystal textures between crossed polarizers and, additionally, support the formation of ordered liquid crystal-like anisotropic superstructures. The ordering within these arrays is also confirmed in bulk samples using small angle X-ray scattering (SAXS).
机译:在有机溶剂在TEM网格上缓慢蒸发时,对于金纳米棒部分或侧面或末端附着的向列液晶覆盖的金纳米棒,观察到了令人着迷的向列和近晶状自组装阵列。这些阵列可以通过施加类似于常规有机向列液晶的Freedericksz跃迁的从准平面到垂直的外部磁场来操纵和重新定向。通过偏振光学显微镜观察到的这些自组装金纳米棒阵列的双折射和薄膜质地强烈地使人联想到交叉偏振器之间的常见有机向列液晶质地,此外,还支持形成有序液晶状各向异性超结构。使用小角度X射线散射(SAXS)在散装样品中也可以确定这些阵列中的顺序。

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  • 来源
    《Advanced Functional Materials》 |2013年第11期|1393-1403|共11页
  • 作者单位

    Department of Chemistry University of Manitoba Winnipeg, MB, R3T 2N2, Canada;

    Department of Chemistry University of Manitoba Winnipeg, MB, R3T 2N2, Canada;

    Department of Chemistry University of Manitoba Winnipeg, MB, R3T 2N2, Canada,Chemical Physics Interdisciplinary Program Liquid Crystal Institute Kent State University Kent, OH 44242, USA,Central Electrochemical Research Institute, Karaikudi-630 006, Tamilnadu, India;

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