Highly Flexible and Ultraprecise Manipulation of Light-Levitated Femtoliter/Picoliter Droplets,The Journal of Physical Chemistry Letters

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Highly Flexible and Ultraprecise Manipulation of Light-Levitated Femtoliter/Picoliter Droplets
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2019-02-13 00:00:00 , DOI: 10.1021/acs.jpclett.8b03699
Long Jiao _{1,

2} , Rong Chen _{1,

2} , Xun Zhu _{1,

2} , Qiang Liao _{1,

2} , Hong Wang _{1,

2} , Liang An ₃ , Jie Zhu ₃ , Xuefeng He _{1,

2} , Hao Feng _{1,

2}

Affiliation

Ultraprecise manipulation of the droplets at the microscale is a promising paradigm for broad implications in reagent transport and element analysis, but the existing strategies still suffer from cross-contamination or the miscellaneous auxiliaries. Inspired by the levitation, we develop a method for excellently manipulating levitated femtoliter/picoliter droplets by a single focused laser. We show that the unique light-induced vapor flow in association with the interface morphology is responsible for creation and manipulation of levitated droplets. In particular, we demonstrate that the levitated droplets formed by this light method show extraordinary motility. The highly accurate two-dimensional labyrinth movement of the levitated droplets with designed trajectories above the free surface is easily realized by scanning the light. These results demonstrate that a single focused light can function as an “optical baton” to enable us to construct a wide variety of the long-sought precise manipulation systems for bioassays, pharmacy, and chemosynthesis.

中文翻译：

轻悬浮的飞升/皮升液滴的高度灵活和超高精度操纵

在微尺度上对液滴的超精确操作是在试剂运输和元素分析中产生广泛影响的一种有希望的范例，但是现有的策略仍然遭受交叉污染或其他助剂的困扰。受悬浮的启发，我们开发了一种通过单个聚焦激光出色地处理悬浮的飞升/皮升液滴的方法。我们表明，与界面形态相关的独特的光诱导蒸气流是造成悬浮液滴的产生和操纵的原因。特别地，我们证明了通过这种光方法形成的悬浮液滴显示出非凡的运动性。通过扫描光，可以轻松实现悬浮液滴的高精度二维迷宫运动，并在自由表面上方具有设计的轨迹。

更新日期：2019-02-13

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