Regensburg 2007 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 15: Poster:ThinFilms(1-33),Transp.(34-49),ExchBias(50-56),
Spindynamics(57-70),Micro-nanostr.Mat.(71-82),
Particles/Clust.(83-88), Mag.Imag./Surface(89-96),
Spinelectronics(97-109), Theory/Micromag.(110-116),
Spinstruct/Phasetr.(117-128),Magn.Mat.(129-139),
Aniso.+Measuring(140-145), MolMag.(146-152),
MSMA(153-156)

MA 15.143: Poster

Dienstag, 27. März 2007, 15:00–19:00, Poster A

Using a highly sensitive TMR sensor array for the detection of moving biomolecules — •Camelia Albon, Sascha Walkenhorst, Simone Herth, Michael Schilling, and Günter Reiss — Thin Films and Nanostructures, Department of Physics, Bielefeld University, Bielefeld, Germany

The use of magnetoresistive biosensors for the detection of biomolecules attached to magnetic nanoparticles is already a well-known technique. For the detection of magnetic nanoparticles attached only by one biomolecule the improvement of the magnetoresistive sensors sensitivity is mandatory. In this way the application of new detection schemes in order to measure the biochemical processes that take place at single biomolecular level can be done more accurately. TMR sensors with MgO as barrier material represent promising candidates to achieve highly improved sensitivity. In order to acquire a spatial resolution for the detection of magnetic nanoparticles a highly integrated sensor array is created. In our approach a sensor array is patterned by e-beam lithography with 20 elliptical sensors having the dimensions of 100×400 nm on an area of 18.2µ m². This TMR array will be used for detection of single molecule processes with the help of magnetic nanoparticles.