Geometry-guided colloidal interactions and self-tiling of elastic dipoles formed by truncated pyramid particles in liquid crystals.
Geometry-guided colloidal interactions and self-tiling of elastic dipoles formed by truncated pyramid particles in liquid crystals.
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液晶中截棱锥粒子形成的几何引导胶体相互作用和弹性偶极子的自平铺。
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
I. Smalyukh
中科院分区：
文献类型：
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作者：
B. Senyuk;Qingkun Liu;E. Bililign;Philip D. Nystrom;I. Smalyukh
在凝聚态物质中实现模仿自然组织形式的胶体结构的进展本质上受到合适的胶体构建块的可用性的限制。为了使新形式的晶体和准晶体的胶体自组织，我们开发截断金字塔粒子，形成具有长程静电和几何形状引导的低对称短程相互作用的弹性偶极子。使用非线性光学成像，激光镊子，和视频显微镜的组合，我们表征胶体对相互作用，并展示了不寻常的形式，这些颗粒的自平铺成晶体，准晶，和其他阵列。我们的研究结果解释使用静电学类比沿着与液晶弹性和对称性破缺的考虑，潜在地扩展胶体的光子和电光应用。
The progress of realizing colloidal structures mimicking natural forms of organization in condensed matter is inherently limited by the availability of suitable colloidal building blocks. To enable new forms of crystalline and quasicrystalline self-organization of colloids, we develop truncated pyramidal particles that form nematic elastic dipoles with long-range electrostaticlike and geometry-guided low-symmetry short-range interactions. Using a combination of nonlinear optical imaging, laser tweezers, and video microscopy, we characterize colloidal pair interactions and demonstrate unusual forms of self-tiling of these particles into crystalline, quasicrystalline, and other arrays. Our findings are explained using an electrostatics analogy along with liquid crystal elasticity and symmetry breaking considerations, potentially expanding photonic and electro-optic applications of colloids.