Measuring the Force Gradient Acting on a Magnetic Microsphere above a Micro-Magnet Array

Svetlana Ponomareva 1 Luiz-Fernando Zanini 2 Frédéric Dumas-Bouchiat 3 Nora Dempsey 2 Dominique Givord 2 Florence Marchi 1
1 NOF - Nano-Optique et Forces
NEEL - Institut Néel
2 MNM - Micro et NanoMagnétisme
NEEL - Institut Néel
3 Axe 2 : procédés de traitements de surface
SPCTS - Science des Procédés Céramiques et de Traitements de Surface
Abstract : The attractive action exerted by an array of micro-magnets on a single polystyrene microsphere containing superparamagnetic iron oxide nanoparticles, the microsphere constituting a model for cells functionalised with such nanoparticles, have been studied in air by using magnetic force microscopy. For this purpose, the method of gluing a magnetic microsphere to an AFM tip has been developed. Using this custom-made colloidal probe, the regions of the micro-magnet array that act as magnetic traps for the magnetic microsphere have been localized and the long-range trap-sphere interactions have been recorded, measured and compared with simulations.
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https://hal-unilim.archives-ouvertes.fr/hal-00946218
Contributeur : Pamela Bathias <>
Soumis le : jeudi 13 février 2014 - 15:25:52
Dernière modification le : mercredi 13 février 2019 - 10:06:08

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Svetlana Ponomareva, Luiz-Fernando Zanini, Frédéric Dumas-Bouchiat, Nora Dempsey, Dominique Givord, et al.. Measuring the Force Gradient Acting on a Magnetic Microsphere above a Micro-Magnet Array. Advanced Materials Research, Trans Tech Publications, 2013, 872, pp.167-173. ⟨10.4028/www.scientific.net/AMR.872.167⟩. ⟨hal-00946218⟩

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