Sculpting stable structures in pure liquids
Sculpting stable structures in pure liquids
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DOI：
10.1126/sciadv.aav4283
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发表时间：
2019-02-01
期刊：
影响因子：
13.6
通讯作者：
Tkalec, Uros
中科院分区：
文献类型：
--
作者：
Emersic, Tadej;Zhang, Rui;Tkalec, Uros
处于热力学平衡的纯液体在结构上是均匀的。在液晶中，流动和光脉冲用于创建具有极性顺序的可重构域。此外，通过精心设计协调的微流体流动和局部光热场，可以实现对这种域的成核、生长和形状的完全控制。实验、理论和模拟表明，只要液体保持在受控的非平衡状态，所得到的结构可以无限期地稳定。由此产生的雕刻液体可以在微流体装置中找到应用，用于将溶质和颗粒选择性地封装到与外部刺激相互作用的光学活性隔室中。
Pure liquids in thermodynamic equilibrium are structurally homogeneous. In liquid crystals, flow and light pulses are used to create reconfigurable domains with polar order. Moreover, through careful engineering of concerted microfluidic flows and localized optothermal fields, it is possible to achieve complete control over the nucleation, growth, and shape of such domains. Experiments, theory, and simulations indicate that the resulting structures can be stabilized indefinitely, provided the liquids are maintained in a controlled nonequilibrium state. The resulting sculpted liquids could find applications in microfluidic devices for selective encapsulation of solutes and particles into optically active compartments that interact with external stimuli.