Microbeads detection using Planar Hall effect in spin-valve structure

N. T. Thanh; K. W. Kim; C. O. Kim; K. H. Shin; C. G. Kim

doi:10.1016/j.jmmm.2007.02.100

Microbeads detection using Planar Hall effect in spin-valve structure

N. T. Thanh
, K. W. Kim
, C. O. Kim
, K. H. Shin
, C. G. Kim

Department of Physics and Chemistry

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

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^® M-280. The patterns with a size of 50 × 100 μ m² 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 μ m². With these results, it could be feasible to detect some commercial Dynabeads^® M-280 which can be used for recognition force and biomolecular interaction measurements.

Original language	English
Pages (from-to)	e238-e241
Journal	Journal of Magnetism and Magnetic Materials
Volume	316
Issue number	2 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.jmmm.2007.02.100
State	Published - Sep 2007

Bibliographical note

Funding Information:
This work was supported by KISTEP under Grant M6-032-00-0036, and KOSEF-ReCAMM program; the Korea Institute of Science and Technology Vision 21 program, and the Ministry of Science and Technology of Korea through the Cavendish-KAIST Cooperative Research program; the ETRI under No. 2006-S-074-01.

Keywords

Biosensors
Magnetic bead detection
Planar Hall sensor

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10.1016/j.jmmm.2007.02.100

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@article{233b35bdab474713bcde6b17efba33fc,

title = "Microbeads detection using Planar Hall effect in spin-valve structure",

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{\textregistered} M-280. The patterns with a size of 50 × 100 μ m2 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 μ m2. With these results, it could be feasible to detect some commercial Dynabeads{\textregistered} M-280 which can be used for recognition force and biomolecular interaction measurements.",

keywords = "Biosensors, Magnetic bead detection, Planar Hall sensor",

author = "Thanh, \{N. T.\} and Kim, \{K. W.\} and Kim, \{C. O.\} and Shin, \{K. H.\} and Kim, \{C. G.\}",

note = "Funding Information: This work was supported by KISTEP under Grant M6-032-00-0036, and KOSEF-ReCAMM program; the Korea Institute of Science and Technology Vision 21 program, and the Ministry of Science and Technology of Korea through the Cavendish-KAIST Cooperative Research program; the ETRI under No. 2006-S-074-01.",

year = "2007",

month = sep,

doi = "10.1016/j.jmmm.2007.02.100",

language = "English",

volume = "316",

pages = "e238--e241",

journal = "Journal of Magnetism and Magnetic Materials",

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T1 - Microbeads detection using Planar Hall effect in spin-valve structure

AU - Thanh, N. T.

AU - Kim, K. W.

AU - Kim, C. O.

AU - Shin, K. H.

AU - Kim, C. G.

N1 - Funding Information: This work was supported by KISTEP under Grant M6-032-00-0036, and KOSEF-ReCAMM program; the Korea Institute of Science and Technology Vision 21 program, and the Ministry of Science and Technology of Korea through the Cavendish-KAIST Cooperative Research program; the ETRI under No. 2006-S-074-01.

PY - 2007/9

Y1 - 2007/9

N2 - 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® M-280. The patterns with a size of 50 × 100 μ m2 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 μ m2. With these results, it could be feasible to detect some commercial Dynabeads® M-280 which can be used for recognition force and biomolecular interaction measurements.

AB - 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® M-280. The patterns with a size of 50 × 100 μ m2 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 μ m2. With these results, it could be feasible to detect some commercial Dynabeads® M-280 which can be used for recognition force and biomolecular interaction measurements.

KW - Biosensors

KW - Magnetic bead detection

KW - Planar Hall sensor

UR - https://www.scopus.com/pages/publications/34250338821

U2 - 10.1016/j.jmmm.2007.02.100

DO - 10.1016/j.jmmm.2007.02.100

M3 - Article

AN - SCOPUS:34250338821

SN - 0304-8853

VL - 316

SP - e238-e241

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 2 SPEC. ISS.

ER -

Microbeads detection using Planar Hall effect in spin-valve structure

Abstract

Bibliographical note

Keywords

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