Journal article
Planar Hall effect sensor for magnetic micro- and nanobead detection
Department of Micro- and Nanotechnology, Technical University of Denmark1
Magnetic Systems Group, LabChip Section, Department of Micro- and Nanotechnology, Technical University of Denmark2
LabChip Section, Department of Micro- and Nanotechnology, Technical University of Denmark3
Instituto de Engenharia de Sistemas e Computadores do Porto4
Magnetic bead sensors based on the planar Hall effect in thin films of exchange-biased permalloy have been fabricated and characterized. Typical sensitivities are 3 muV/Oe mA. The sensor response to an applied magnetic field has been measured without and with coatings of commercially available 2 mum and 250 nm magnetic beads used for bioapplications (Micromer-M and Nanomag-D, Micromod, Germany).
Detection of both types of beads and single bead detection of 2 mum beads is demonstrated, i.e., the technique is feasible for magnetic biosensors. Single 2 mum beads yield 300 nV signals at 10 mA and 15 Oe applied field. (C) 2004 American Institute of Physics.
| Language: | English |
|---|---|
| Publisher: | American Institute of Physics |
| Year: | 2004 |
| Pages: | 4729-4731 |
| ISSN: | 10773118 and 00036951 |
| Types: | Journal article |
| DOI: | 10.1063/1.1759380 |
| ORCIDs: | Hansen, Mikkel Fougt |
