Microbeads detection using Planar Hall effect in spin-valve structure

Authors
Thanh, N. T.Kim, K. W.Kim, C. O.Shin, K. H.Kim, C. G.
Issue Date
2007-09
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.316, no.2, pp.E238 - E241
Abstract
The Planar Hall effect in a spin-valve structure of Ta/NiFe/CoFe/Cu/CoFe/IrMn/Ta has been applied as a biosensor being capable of detecting Dynabeads((R)) M-280. The patterns with a size of 50 x 100 mu m(2) were prepared by lithography methods, and the biosensor performance was tested under the application of a DC magnetic field where the output signals were obtained from a nanovoltmeter. The sensor signal has produced high sensitivity results; especially, the real-time profiles revealed stable and significant signals at external applied magnetic field of around 7.0 Oe with the resolution of 0.04 beads per mu m(2). With these results, it could be feasible to detect some commercial Dynabeads((R)) M-280 which can be used for recognition force and biomolecular interaction measurements. (c) 2007 Elsevier B.V. All rights reserved.
Keywords
MAGNETIC MICROBEAD; SENSORS; MAGNETIC MICROBEAD; SENSORS; magnetic bead detection; Planar Hall sensor; biosensors
ISSN
0304-8853
URI
https://pubs.kist.re.kr/handle/201004/134150
DOI
10.1016/j.jmmm.2007.02.100
Appears in Collections:
KIST Article > 2007
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