Journal
MICROFLUIDICS AND NANOFLUIDICS
Volume 1, Issue 3, Pages 280-283Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10404-005-0033-z
Keywords
hydrodynamic focusing; vacuum pumping
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Hydrodynamic focusing has proven to be a useful microfluidics technique for the study of systems under rapid mixing conditions. Most studies to date have used a push configuration, requiring multiple pumps or pressure sources that complicate implementation and limit applications in point-of-care environments. Here, we demonstrate a simplified hydrodynamic focusing approach, in which a single pump pulling at the device outlet can be used to drive hydrodynamic focusing with not only excellent control over the focus width and stream velocity, but also with minimal sample consumption. In this technique, flow can be either mechanically driven or induced simply through Capillarity.
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