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  Rotational microrheology of Maxwell fluids using micron-sized wires

Colin, R., Chevry, L., Berret, J.-F., & Abou, B. (2014). Rotational microrheology of Maxwell fluids using micron-sized wires. SOFT MATTER, 10(8), 1167-1173. doi:10.1039/c3sm52726c.

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 Creators:
Colin, Rémy1, Author                 
Chevry, Loudjy2, Author
Berret, Jean-Francois2, Author
Abou, Berengere2, Author
Affiliations:
1Laboratoire Matière et Systèmes Complexes, UMR CNRS 7057, Université Paris Diderot, Paris, France, ou_persistent22              
2external, ou_persistent22              

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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 mu m. 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 similar 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.

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 Dates: 2014
 Publication Status: Issued
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 Identifiers: ISI: 000331244800010
DOI: 10.1039/c3sm52726c
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Title: SOFT MATTER
Source Genre: Journal
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Pages: - Volume / Issue: 10 (8) Sequence Number: - Start / End Page: 1167 - 1173 Identifier: ISSN: 1744-683X