Correlations in suspensions confined between viscoelastic surfaces: Noncontact microrheology

Chen Bar-Haim and Haim Diamant
Phys. Rev. E 96, 022607 – Published 11 August 2017; Erratum Phys. Rev. E 96, 039902 (2017)

Abstract

We study theoretically the velocity cross-correlations of a viscous fluid confined in a slit between two viscoelastic media. We analyze the effect of these correlations on the motions of particles suspended in the fluid. The compliance of the confining boundaries gives rise to a long-ranged pair correlation, decaying only as 1/r with the interparticle distance r. We show how this long-ranged effect may be used to extract the viscoelastic properties of the confining media without embedding tracer particles in them. We discuss the remarkable robustness of such a potential technique with respect to details of the confinement, and its expected statistical advantages over standard two-point microrheology.

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  • Received 30 April 2017

DOI:https://doi.org/10.1103/PhysRevE.96.022607

©2017 American Physical Society

Physics Subject Headings (PhySH)

Polymers & Soft Matter

Erratum

Authors & Affiliations

Chen Bar-Haim* and Haim Diamant

  • Raymond & Beverly Sackler School of Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel

  • *chenbar@tau.ac.il
  • hdiamant@tau.ac.il

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Issue

Vol. 96, Iss. 2 — August 2017

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