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, Devens Gust

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75 Citations (Scopus)


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
Issue number3
Publication statusPublished - Jul 28 2006

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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