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Title: Bead Capture on Magnetic Sensors in a Microfluidic System
Type: Journal articleJournal article
Participant(s):
Author:  Østerberg, Frederik Westergaard (Cwisno: 27355)
Technical University of Denmark
Email:

Author:  Dalslet, Bjarke Thomas (Cwisno: 21396)
Technical University of Denmark

Author:  Damsgaard, Christian Danvad (Cwisno: 9800)
Technical University of Denmark
Email:

Forfatter:  Freitas, S. C.
Technical University of Denmark

Forfatter:  Freitas, P. P.
Technical University of Denmark

Author:  Hansen, Mikkel Fougt (Cwisno: 804)
Technical University of Denmark
Email:

Abstract: The accumulation of magnetic beads by gravitational sedimentation and magnetic capture on a planar Hall-effect sensor integrated in a microfluidic channel is studied systematically as a function of the bead concentration, the fluid flow rate, and the sensor bias current. It is demonstrated that the sedimentation flux is proportional to the bead concentration and has a power law relation to the fluid flow rate. The mechanisms for the bead accumulation are investigated and it is found that gravitational sedimentation dominates the bead accumulation, whereas the stability of the sedimented beads against the fluid flow is defined by the localized magnetic fields from the sensor.
Published: in journal: IEEE Sensors Journal (ISSN: 1530-437X) (DOI: http://dx.doi.org/10.1109/JSEN.2009.2021122), vol: 9, issue: 5-6, pages: 682-688, 2009
DOI:
File(s):
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