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Issue 7, 2014
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Anisotropic Janus Si nanopillar arrays as a microfluidic one-way valve for gas–liquid separation

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Abstract

In this paper, we demonstrate a facile strategy for the fabrication of a one-way valve for microfluidic (MF) systems. The micro-valve was fabricated by embedding arrays of Janus Si elliptical pillars (Si-EPAs) with anisotropic wettability into a MF channel fabricated in poly(dimethylsiloxane) (PDMS). Two sides of the Janus pillar are functionalized with molecules with distinct surface energies. The ability of the Janus pillar array to act as a valve was proved by investigating the flow behaviour of water in a T-shaped microchannel at different flow rates and pressures. In addition, the one-way valve was used to achieve gas–liquid separation. We believe that the Janus Si-EPAs modified by specific surface functionalization provide a new strategy to control the flow and motion of fluids in MF channels.

Graphical abstract: Anisotropic Janus Si nanopillar arrays as a microfluidic one-way valve for gas–liquid separation

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Publication details

The article was received on 04 Nov 2013, accepted on 18 Jan 2014 and first published on 27 Jan 2014


Article type: Paper
DOI: 10.1039/C3NR05865D
Author version available: Download Author version (PDF)
Citation: Nanoscale, 2014,6, 3846-3853
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    Anisotropic Janus Si nanopillar arrays as a microfluidic one-way valve for gas–liquid separation

    T. Wang, H. Chen, K. Liu, Y. Li, P. Xue, Y. Yu, S. Wang, J. Zhang, E. Kumacheva and B. Yang, Nanoscale, 2014, 6, 3846
    DOI: 10.1039/C3NR05865D

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