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Issue 21, 2009
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Rapid switching of chemical signals in microfluidic devices

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Abstract

We present an analysis of concentration switching times in microfluidic devices. The limits of rapid switching are analyzed based on the theory of dispersion by Taylor and Aris and compared to both experiments and numerical simulations. We focus on switching times obtained by photo-activation of caged compounds in a micro-flow (flow photolysis). The performance of flow photolysis is compared to other switching techniques. A flow chart is provided to facilitate the application of our theoretical analysis to microfluidic switching devices.

Graphical abstract: Rapid switching of chemical signals in microfluidic devices

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Supplementary files

Article information


Submitted
18 Mar 2009
Accepted
15 Jun 2009
First published
03 Jul 2009

Lab Chip, 2009,9, 3059-3065
Article type
Paper

Rapid switching of chemical signals in microfluidic devices

A. J. Bae, C. Beta and E. Bodenschatz, Lab Chip, 2009, 9, 3059
DOI: 10.1039/B905521E

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