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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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Supplementary files

Article information


Submitted
30 Jul 2009
Accepted
11 Nov 2009
First published
15 Jan 2010

Lab Chip, 2010,10, 456-461
Article type
Paper

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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