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Rotational microrheology of Maxwell fluids using micron-sized wires by Colin, Rémy; Chevry, Loudjy; Berret, Jean-François; Abou, Bérengère is a scholarly article available to read on EtoBox.

What is Rotational microrheology of Maxwell fluids using micron-sized wires about?

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.

Author

Colin, Rémy; Chevry, Loudjy; Berret, Jean-François; Abou, Bérengère

Published

2013

Language

EN