Periodic assembly of nanoparticle arrays in disclinations of cholesteric liquid crystals
| Autor: | Eugenia Kumacheva, Yunfeng Li, Youssef Mosaddeghian Golestani, Sangho Cho, Elisabeth Prince, Oleg D. Lavrentovich, Alinaghi Salari |
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| Rok vydání: | 2017 |
| Předmět: |
Multidisciplinary
Materials science Cholesteric liquid crystal Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Topological defect Condensed Matter::Soft Condensed Matter Surface tension Chemical physics Liquid crystal Lyotropic Physical Sciences Soft matter 0210 nano-technology Anisotropy |
| Zdroj: | Proceedings of the National Academy of Sciences of the United States of America. 114(9) |
| ISSN: | 1091-6490 |
| Popis: | An important goal of the modern soft matter science is to discover new self-assembly modalities to precisely control the placement of small particles in space. Spatial inhomogeneity of liquid crystals offers the capability to organize colloids in certain regions such as the cores of the topological defects. Here we report two self-assembly modes of nanoparticles in linear defects-disclinations in a lyotropic colloidal cholesteric liquid crystal: a continuous helicoidal thread and a periodic array of discrete beads. The beads form one-dimensional arrays with a periodicity that matches half a pitch of the cholesteric phase. The periodic assembly is governed by the anisotropic surface tension and elasticity at the interface of beads with the liquid crystal. This mode of self-assembly of nanoparticles in disclinations expands our ability to use topological defects in liquid crystals as templates for the organization of nanocolloids. |
| Databáze: | OpenAIRE |
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