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Article Dans Une Revue Journal of Applied Physics Année : 2012

Micromagnet structures for magnetic positioning and alignment

Osman Osman
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Marie Frénéa-Robin
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Naoufel Haddour
Nora Dempsey

Résumé

High performance hard magnetic films (NdFeB, SmCo) have been patterned at the micron scale using thermo-magnetic patterning. Both out-of-plane and in-plane magnetized structures have been prepared. These micromagnet arrays have been used for the precise positioning and alignment of superparamagnetic nano- and microparticles. The specific spatial arrangement achieved is shown to depend on both the particle size and the size and orientation of the micromagnets. These micromagnet arrays were used to trap cells magnetically functionalized by endocytosis of 100 nm superparamagnetic particles. These simple, compact, and autonomous structures, which need neither an external magnetic field source nor a power supply, have much potential for use in a wide range of biological applications.
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Dates et versions

hal-00734030 , version 1 (20-09-2012)

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Luiz-Fernando Zanini, Osman Osman, Marie Frénéa-Robin, Naoufel Haddour, Nora Dempsey, et al.. Micromagnet structures for magnetic positioning and alignment. Journal of Applied Physics, 2012, 11 (7), pp.07B312-07B312-3. ⟨10.1063/1.3675067⟩. ⟨hal-00734030⟩
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