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Article Dans Une Revue Advanced Materials Research Année : 2013

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

Svetlana Ponomareva
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Nora Dempsey
Dominique Givord
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Florence Marchi
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Résumé

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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Dates et versions

hal-00946218 , version 1 (13-02-2014)

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Citer

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, 2013, 872, pp.167-173. ⟨10.4028/www.scientific.net/AMR.872.167⟩. ⟨hal-00946218⟩
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