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Issue 4, 2010
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Designed pneumatic valve actuators for controlled droplet breakup and generation

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Abstract

The dynamic breakup of emulsion droplets was demonstrated in double-layered microfluidic devices equipped with designed pneumatic actuators. Uniform emulsion droplets, produced by shearing at a T-junction, were broken into smaller droplets when they passed downstream through constrictions formed by a pneumatically actuated valve in the upper control layer. The valve-assisted droplet breakup was significantly affected by the shape and layout of the control valves on the emulsion flow channel. Interestingly, by actuating the pneumatic valve immediately above the T-junction, the sizes of the emulsion droplets were controlled precisely in a programmatic manner that produced arrays of uniform emulsion droplets in various sizes and dynamic patterns.

Graphical abstract: Designed pneumatic valve actuators for controlled droplet breakup and generation

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Publication details

The article was received on 30 Jul 2009, accepted on 11 Nov 2009 and first published on 15 Jan 2010


Article type: Paper
DOI: 10.1039/B915596A
Citation: Lab Chip, 2010,10, 456-461
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    Designed pneumatic valve actuators for controlled droplet breakup and generation

    J. Choi, S. Lee, J. Lim, S. Yang and G. Yi, Lab Chip, 2010, 10, 456
    DOI: 10.1039/B915596A

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