Towards a programmable magnetic bead microarray in a microfluidic channel

Kristian Smistrup, Henrik Bruus, Mikkel Fougt Hansen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    A new hybrid magnetic bead separator that combines an external magnetic field with 175@mm thick current lines buried in the back side of a silicon wafer is presented. A microfluidic channel was etched into the front side of the wafer. The large cross-section of the current lines makes it possible to use larger currents and obtain forces of longer range than from thin current lines at a given power limit. Guiding of magnetic beads in the hybrid magnetic separator and the construction of a programmable microarray of magnetic beads in the microfluidic channel by hydrodynamic focusing is presented.
    Original languageEnglish
    JournalJournal of Magnetism and Magnetic Materials
    Volume311
    Issue number1
    Pages (from-to)409-415
    ISSN0304-8853
    Publication statusPublished - 2007

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