A biochip based on magnetoresistive sensors

J. Schotter, P.b. Kamp, A. Becker, A. Puhler, D. Brinkmann, W. Schepper, H. Bruckl, G. Reiss

Research output: Contribution to journalArticlepeer-review

Abstract

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.
Original languageEnglish
Pages (from-to)3365-3367
JournalIEEE Transactions on Magnetics
Volume38
Issue number5
DOIs
Publication statusPublished - 1 Sept 2002
Externally publishedYes

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