Extensive characterization of magnetic microrods observed using optical microscopy

Soft Matter
Fabien GerbalJean-Claude Bacri

Abstract

The usage of micro or nanorods is steadily increasing in various applications from fundamental research to industry. Therefore their geometrical, mechanical and eventually magnetic properties need to be well determined. Here, using an optical microscope equipped with magnetic tweezers, we report an experimental procedure to obtain all those information on a single magnetic rod. In particular, we measure magnetic susceptibility χ by analyzing the deformation of a rod subjected to a uniform magnetic field. To do so, we refine a theoretical model which takes into account the variation of χ with the internal field. We prove experimentally that this model yields consistent measurements, at any value of the field strength and the incidence angle. From the combination of the different measurements, we also deduce the number of iron oxide nanoparticles which are embedded within the polymer matrix of the superparamagnetic rods under study.

References

Dec 11, 1995·Physical Review Letters·F C MacKintoshP A Janmey
Mar 23, 2002·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·F GazeauR Perzynski
Nov 13, 2008·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·J FresnaisF Cousin
Mar 16, 2011·ACS Applied Materials & Interfaces·M YanJ-F Berret
Jan 1, 2009·Sensors·Valentina ZhukovaArcady Zhukov
Mar 22, 2014·Soft Matter·Rémy ColinBérengère Abou
May 28, 2015·Proceedings of the National Academy of Sciences of the United States of America·Fabien GerbalMartin Devaud
Feb 24, 2017·Proceedings of the National Academy of Sciences of the United States of America·Fabien Gerbal, Yuan Wang

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