Superparamagnetic nanoparticle-based nanobiomolecular detection in a microfluidic channel

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A novel biomolecular detection principle based on the magnetic force in a microfluidic channel or a lab-on-a-chip was developed. The microbeads conjugated with superparamagnetic nanoparticles can only switch their own fluidic path in a microfluidic channel due to magnetic fields. To investigate the migration behavior of microbeads, the sample and buffer solutions were injected in the same flow rate to make a laminar flow. The streptavidin conjugated superparamagnetic nanoparticles were reacted with biotinylated fluorescent microbeads. The velocities of microbeads were observed in a microchannel by the CCD camera on an inverted microscope. As expected, the movements of microbeads conjugated with superparamagnetic nanoparticles were dependent upon the concentrations of superparamagnetic nanoparticles. This detection scheme can be useful for various assay systems and multiplexed biological analysis systems using encoded microbeads. (c) 2005 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2006-10
Language
English
Article Type
Article; Proceedings Paper
Keywords

MAGNETIC BEADS; PROTEINS; SENSOR

Citation

CURRENT APPLIED PHYSICS, v.6, pp.976 - 981

ISSN
1567-1739
DOI
10.1016/j.cap.2005.07.001
URI
http://hdl.handle.net/10203/93194
Appears in Collection
BiS-Journal Papers(저널논문)
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