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Magnetic Trapping of Nanowires
Monica Tanase, Anne Hultgren, Peter C. Searson, Gerald J. Meyer, and Daniel H. Reich
Magnetic trapping is a new technique for assembling and addressing magnetic nanostructures that are fabricated by non-lithographic means.
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| Schematic representation of
the magnetic trapping process. Magnetized nanowires are suspended
in water, and a small external magnetic field H aligns them parallel to the
long axis of lithographically fabricated magnets.
Dipolar forces attract and trap the nanowires in the regions of strong
local magnetic field between the poles of the magnets. |
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| Nanowires with noble metal caps
produce low-resistance electrical contacts when trapped. (a) Scanning electron
microscope (SEM) image of a 3-segment electrodeposited Pt-Ni-Pt nanowire.
The central Ni segment is 8
microns long, and the Pt segments are each 2 microns long.
(b) SEM image of a Pt-Ni-Pt nanowire trapped by
elliptical Ni magnetic electrodes.
The vertical bars are Au leads for electrical measurements. |
Download a preprint to learn more:
M. Tanase, A. Hultgren, P. C. Searson, G. J. Meyer and D. H. Reich, "Magnetic Trapping of Multicomponent Nanowires"
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