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Micromagnet Conductors for High-Resolution Separation of Magnetically Driven Beads and Cells at Multiple Frequencies

Title
Micromagnet Conductors for High-Resolution Separation of Magnetically Driven Beads and Cells at Multiple Frequencies
Author(s)
Hu, XinghaoTorati, Sri RamuluShawl, Asif IqbalLim, ByeonghwaKim, KunwooKim, CheolGi
Issued Date
2016
Citation
IEEE Magnetics Letters, v.7
Type
Article
Author Keywords
Biomagneticsin-plane rotating fieldsuperparamagnetic beadscellsseparationmulti-frequencies
Keywords
ARRAYSBiomagneticsCELLSCritical FrequenciesDragHigh-Resolution SeparationsIn-Plane Rotating FieldMagnetic SusceptibilityMagnetismMAGNETOPHORESISMANIPULATIONMulti-FrequenciesMulti FrequencyPARTICLESPATHWAYRotating DisksRotating FieldsRotating Magnetic FieldsSelective SeparationSeparationSuperparamagnetic BeadsSuperparamagnetismTWEEZERS
ISSN
1949-307X
Abstract
We demonstrate a separation method for complex mixture of superparamagnetic beads using half-disk pathways, under an in-plane rotating magnetic field, which is highly sensitive to the bead size and magnetic susceptibility. The non-linear dynamics of the beads moving along the half-disk pathways at multiple frequencies can be divided into three regimes: a phase-locked regime at low driving frequencies, a phase-slipping regime above the first critical frequency fc1, and a phase-insulated regime above the second critical frequency fc2 in which the beads just hop at the gaps between two half-disks. Hence, based on the dynamical motions, the beads with varied sizes or heterogenic magnetic properties can be separated efficiently. Furthermore, a bio-selective separation of bead plus human monocytic leukemia (THP-1) cell complexes from bare beads has been achieved due to the increased drag force on the complexes, resulting in a decreased critical frequency. © 2010-2012 IEEE.
URI
http://hdl.handle.net/20.500.11750/2776
DOI
10.1109/LMAG.2016.2614253
Publisher
Institute of Electrical and Electronics Engineers Inc.
Related Researcher
  • 김철기 Kim, CheolGi
  • Research Interests Magnetic Materials and Spintronics; Converging Technology of Nanomaterials and Biomaterials; Bio-NEMS;MEMS
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Department of Physics and Chemistry Lab for NanoBio-Materials & SpinTronics(nBEST) 1. Journal Articles

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