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Issue 8, 2014
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Rotational microrheology of Maxwell fluids using micron-sized wires

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Abstract

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 μm. The viscoelastic properties of the suspending fluids are examined from this analysis and found to be in good agreement with macrorheology data. Viscosities of simple and complex fluids between 10−2 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.

Graphical abstract: Rotational microrheology of Maxwell fluids using micron-sized wires

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Publication details

The article was received on 25 Oct 2013, accepted on 27 Nov 2013 and first published on 29 Nov 2013


Article type: Paper
DOI: 10.1039/C3SM52726C
Citation: Soft Matter, 2014,10, 1167-1173
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    Rotational microrheology of Maxwell fluids using micron-sized wires

    R. Colin, L. Chevry, J. Berret and B. Abou, Soft Matter, 2014, 10, 1167
    DOI: 10.1039/C3SM52726C

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