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Race Tracks for Cells and Molecules

Ferrite Particles on magnetic zig-zag stripes

Set of race tracks made by electron-beam lithography of a FeCo thin film.

The domain walls are pushed to the stripes' kinks causing potential minima at these locations.

Small external fields can be used to push the particles from kink to kink.

Fig.1: Ferrite beads sitting on a set of magnetic race tracks

Fig.2: Motion of a cancer cell incorporating a magnetic bead. Cell diameter is ca. 10 μm.

Contact: Thorsten Grassmann, Klaus Gieb