We report experiments that show rapid crystallization of colloids tethered to an oil-water interface in response to laser illumination. This light-induced transition is due to a combination of long-ranged thermophoretic pumping and local optical binding. We show that the flow-induced force on the colloids can be described as the gradient of a potential. The nonequilibrium steady state due to local heating thus admits an effective equilibrium description. The optofluidic manipulation explored in this work opens novel ways to manipulate and assemble colloidal particles.

中文翻译：

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在界面处束缚的胶体的受控光流体结晶。

我们报告的实验表明响应激光照射，胶体快速束缚到油水界面的结晶。这种光诱导的转变是由于远距离热泳泵浦和局部光学结合的结合。我们表明，在胶体上的流致力可以描述为电位的梯度。因此，由于局部加热而引起的非平衡稳态可以接受有效的平衡描述。在这项工作中探索的光流体操纵为操纵和组装胶体颗粒开辟了新的途径。