Discrete magnetic microfluidics

Ana Egatz-Gómez, Sonia Melle, Antonio A. García, S. A. Lindsay, M. Márquez, P. Domínguez-García, Miguel A. Rubio, S. T. Picraux, J. L. Taraci, T. Clement, D. Yang, Mark A. Hayes, John Devens Gust

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Abstract

We present a method to move and control drops of water on superhydrophobic surfaces using magnetic fields. Small water drops (volume of 5-35 μl) that contain fractions of paramagnetic particles as low as 0.1% in weight can be moved at relatively high speed (7 cm/s) by displacing a permanent magnet placed below the surface. Coalescence of two drops has been demonstrated by moving a drop that contains paramagnetic particles towards an aqueous drop that was previously pinned to a surface defect. This approach to microfluidics has the advantages of faster and more flexible control over drop movement.

Original languageEnglish
Article number034106
JournalApplied Physics Letters
Volume89
Issue number3
DOIs
Publication statusPublished - 2006

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Egatz-Gómez, A., Melle, S., García, A. A., Lindsay, S. A., Márquez, M., Domínguez-García, P., ... Gust, J. D. (2006). Discrete magnetic microfluidics. Applied Physics Letters, 89(3), [034106]. https://doi.org/10.1063/1.2227517