Periodic assembly of nanoparticle arrays in disclinations of cholesteric liquid crystals
- Periodic assembly of nanoparticle arrays in disclinations of cholesteric liquid crystals
- 조상호; Yunfeng Li; Elisabeth Prince; Alinaghi Salari; Youssef Mosaddeghian Golestani; Oleg D. Lavrentovich; Eugenia Kumacheva
- Issue Date
- Proceedings of the National Academy of Sciences of the United States of America
- VOL 114, NO 9-2142
- 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 selfassembly 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.
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