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Issue 15, 2010
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Surface-acoustic-wave counterflow micropumps for on-chip liquid motion control in two-dimensional microchannel arrays

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Abstract

Fully controlled liquid injection and flow in hydrophobic polydimethylsiloxane (PDMS) two-dimensional microchannel arrays based on on-chip integrated, low-voltage-driven micropumps are demonstrated. Our architecture exploits the surface-acoustic-wave (SAW) induced counterflow mechanism and the effect of nebulization anisotropies at crossing areas owing to lateral propagating SAWs. We show that by selectively exciting single or multiple SAWs, fluids can be drawn from their reservoirs and moved towards selected positions of a microchannel grid. Splitting of the main liquid flow is also demonstrated by exploiting multiple SAW beams. As a demonstrator, we show simultaneous filling of two orthogonal microchannels. The present results show that SAW micropumps are good candidates for truly integrated on-chip fluidic networks allowing liquid control in arbitrarily shaped two-dimensional microchannel arrays.

Graphical abstract: Surface-acoustic-wave counterflow micropumps for on-chip liquid motion control in two-dimensional microchannel arrays

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Publication details

The article was received on 08 Jan 2010, accepted on 12 May 2010 and first published on 07 Jun 2010


Article type: Technical Note
DOI: 10.1039/C000490A
Citation: Lab Chip, 2010,10, 1997-2000
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    Surface-acoustic-wave counterflow micropumps for on-chip liquid motion control in two-dimensional microchannel arrays

    L. Masini, M. Cecchini, S. Girardo, R. Cingolani, D. Pisignano and F. Beltram, Lab Chip, 2010, 10, 1997
    DOI: 10.1039/C000490A

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