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

Svetlana Ponomareva; Luiz-Fernando Zanini; Frédéric Dumas-Bouchiat; Nora Dempsey; Dominique Givord; Florence Marchi

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.

keyword : Colloidal Probe Fabrication Magnetic Force Microscopy Micro-Magnet Array Nanoscale Interaction Measurement

Type de document :

Article dans une revue

Domaine :

Chimie / Matériaux

Liste complète des métadonnées

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

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

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

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