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Article Dans Une Revue Soft Matter Année : 2014

Rotational microrheology of Maxwell fluids using micron-sized wires

Loudjy Chevry
  • Fonction : Auteur
Bérengère Abou

Résumé

We demonstrate a simple method for rotational microrheology in complex fluids, using micrometric wires. The three-dimensional rotational Brownian motion of the wires suspended in Maxwell fluids is measured from their projection on the focal plane of a microscope. We analyze the mean-squared angular displacement of the wires of length between 1 and 40 microns. The viscoelastic properties of the suspending fluids are extracted from this analysis and found to be in good agreement with macrorheology data. Viscosities of simple and complex fluids between 0.01 and 30 Pa.s could be measured. As for the elastic modulus, values up to ~ 5 Pa could be determined. This simple technique, allowing for a broad range of probed length scales, opens new perspectives in microrheology of heterogeneous materials such as gels, glasses and cells.

Dates et versions

hal-00919540 , version 1 (17-12-2013)

Identifiants

Citer

Rémy Colin, Loudjy Chevry, Jean-François Berret, Bérengère Abou. Rotational microrheology of Maxwell fluids using micron-sized wires. Soft Matter, 2014, 10 (8), pp.1167-1173. ⟨10.1039/c3sm52726c⟩. ⟨hal-00919540⟩
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