Dynamic air/liquid pockets for guiding microscale flow

Xu Hou (), Jianyu Li, Alexander B. Tesler, Yuxing Yao, Miao Wang, Lingli Min, Zhizhi Sheng and Joanna Aizenberg ()
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Xu Hou: College of Physical Science and Technology, Xiamen University
Jianyu Li: Harvard University
Alexander B. Tesler: Harvard University
Yuxing Yao: Harvard University
Miao Wang: College of Physical Science and Technology, Xiamen University
Lingli Min: Xiamen University
Zhizhi Sheng: Xiamen University
Joanna Aizenberg: Harvard University

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract Microscale flows of fluids are mainly guided either by solid matrices or by liquid–liquid interfaces. However, the solid matrices are plagued with persistent fouling problems, while liquid–liquid interfaces are limited to low-pressure applications. Here we report a dynamic liquid/solid/gas material containing both air and liquid pockets, which are formed by partially infiltrating a porous matrix with a functional liquid. Using detailed theoretical and experimental data, we show that the distribution of the air- and liquid-filled pores is responsive to pressure and enables the formation and instantaneous recovery of stable liquid–liquid interfaces that sustain a wide range of pressures and prevent channel contamination. This adaptive design is demonstrated for polymeric materials and extended to metal-based systems that can achieve unmatched mechanical and thermal stability. Our platform with its unique adaptive pressure and antifouling capabilities may offer potential solutions to flow control in microfluidics, medical devices, microscale synthesis, and biological assays.

Date: 2018
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DOI: 10.1038/s41467-018-03194-z

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