A biochip based on magnetoresistive sensors

A biochip based on magnetoresistive sensors

The signal response of Bangs Laboratories magnetic markers with a mean diameter of 0.86 /spl mu/m on a spiral-shaped giant magnetoresistance sensor with a diameter of 70 /spl mu/m is investigated. The data show a linear dependence of the sensor signal on the surface coverage of the magnetic markers....

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Veröffentlicht in:IEEE transactions on magnetics 2002-09, Vol.38 (5), p.3365-3367
Hauptverfasser: Schotter, J., Kamp, P.B., Becker, A., Puhler, A., Brinkmann, D., Schepper, W., Bruckl, H., Reiss, G.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Biosensors
DNA
Electronics
Exact sciences and technology
Giant magnetoresistance
Laboratories
Magnetic analysis
Magnetic devices
Magnetic sensors
Magnetic separation
Magnetic thin film devices: magnetic heads (magnetoresistive, inductive, etc.)
domain-motion devices, etc
Magnetism
Magnetoresistive devices
Probes
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Tunneling magnetoresistance
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Beschreibung
Zusammenfassung:The signal response of Bangs Laboratories magnetic markers with a mean diameter of 0.86 /spl mu/m on a spiral-shaped giant magnetoresistance sensor with a diameter of 70 /spl mu/m is investigated. The data show a linear dependence of the sensor signal on the surface coverage of the magnetic markers. The detection limit is reached at a coverage of about 5%, which corresponds to about 200 markers distributed across the surface of the sensor. The corresponding molecular binding of the analyte DNA and the magnetic markers show good selectivity and sensitivity.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2002.802290