| Bead magnetorelaxometry with an on-chip magnetoresistive sensor. | |
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MedLine Citation:
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PMID: 20978654 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Magnetorelaxometry measurements on suspensions of magnetic beads are demonstrated using a planar Hall effect sensor chip embedded in a microfluidic system. The alternating magnetic field used for magnetizing the beads is provided by the sensor bias current and the complex magnetic susceptibility spectra are recorded as the 2nd harmonic of the sensor response. The complex magnetic susceptibility signal appears when a magnetic bead suspension is injected, it scales with the bead concentration, and it follows the Cole-Cole expression for Brownian relaxation. The complex magnetic susceptibility signal resembles that from conventional magnetorelaxometry done on the same samples apart from an offset in Brownian relaxation frequency. The time dependence of the signal can be rationalized as originating from sedimented beads. |
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Authors:
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Bjarke Thomas Dalslet; Christian Danvad Damsgaard; Marco Donolato; Maria Strømme; Mattias Strömberg; Peter Svedlindh; Mikkel Fougt Hansen |
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Publication Detail:
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Type: Journal Article Date: 2010-10-26 |
Journal Detail:
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Title: Lab on a chip Volume: 11 ISSN: 1473-0197 ISO Abbreviation: Lab Chip Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2010-12-21 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101128948 Medline TA: Lab Chip Country: England |
Other Details:
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Languages: eng Pagination: 296-302 Citation Subset: IM |
Affiliation:
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Department of Micro- and Nanotechnology, Technical University of Denmark, DTU Nanotech, Building 345 East, 2800, Kgs. Lyngby, Denmark. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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