Microrheology of viscoelastic solutions studied by magnetic rotational spectroscopy

Jean-Francois Berret (1)

1 MSC - Matière et Systèmes Complexes

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.

Mots clés: magnetic wires; microrheology; Maxwell fluid; Magnetic rotational spectroscopy; wormlike micelles

Domaines: Matière Molle [cond-mat.soft]; Instrumentations et Détecteurs [physics.ins-det]

Jean-Francois Berret. Microrheology of viscoelastic solutions studied by magnetic rotational spectroscopy. International Journal of Nanotechnology, 2016, 13 (8/9), pp.597. ⟨10.1504/IJNT.2016.079661⟩. ⟨hal-02413704⟩