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Issue 13, 2012
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Measuring acoustic energy density in microchannel acoustophoresis using a simple and rapid light-intensity method

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Abstract

We present a simple and rapid method for measuring the acoustic energy density in microchannel acoustophoresis based on light-intensity measurements of a suspension of particles. The method relies on the assumption that each particle in the suspension undergoes single-particle acoustophoresis. It is validated by the single-particle tracking method, and we show by proper re-scaling that the re-scaled light intensity plotted versus re-scaled time falls on a universal curve. The method allows for analysis of moderate-resolution images in the concentration range encountered in typical experiments, and it is an attractive alternative to particle tracking and particle image velocimetry for quantifying acoustophoretic performance in microchannels.

Graphical abstract: Measuring acoustic energy density in microchannel acoustophoresis using a simple and rapid light-intensity method

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Publication details

The article was received on 03 Feb 2012, accepted on 13 Mar 2012 and first published on 20 Mar 2012


Article type: Paper
DOI: 10.1039/C2LC40120G
Citation: Lab Chip, 2012,12, 2337-2344
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    Measuring acoustic energy density in microchannel acoustophoresis using a simple and rapid light-intensity method

    R. Barnkob, I. Iranmanesh, M. Wiklund and H. Bruus, Lab Chip, 2012, 12, 2337
    DOI: 10.1039/C2LC40120G

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