Title: Microrheology of viscoelastic solutions studied by magnetic rotational spectroscopy

Authors: Jean-François Berret

Addresses: Matière et Systèmes Complexes, UMR 7057 CNRS, Université Denis Diderot Paris-VII, Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, F-75205 Paris, France

Abstract: Magnetic rotational spectroscopy is based on the use of magnetic micron-size wires for viscosity measurements. Submitted to a rotational magnetic field with increasing frequency, the wires undergo a hydrodynamic instability between a synchronous and an asynchronous regime. From a comparison between predictions and experiments, the static shear viscosity and elastic modulus of wormlike micellar solutions are here determined. The values agree with the determination by cone-and-plate rheometry.

Keywords: magnetic wires; microrheology; Maxwell fluid; magnetic rotational spectroscopy; wormlike micelles; viscoelastic solutions; nanotechnology; static shear viscosity; elastic modulus.

DOI: 10.1504/IJNT.2016.079661

International Journal of Nanotechnology, 2016 Vol.13 No.8/9, pp.597 - 603

Published online: 07 Oct 2016 *

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