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Detachment dynamics of colloidal spheres with adhesive interactions

J. Bergenholtz*

  • Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96, Gothenburg, Sweden

  • *jbergen@chem.gu.se
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Phys. Rev. E 97, 042610 – Published 23 April, 2018

DOI: https://doi.org/10.1103/PhysRevE.97.042610

Abstract

Escape of colloidal-size particles from various kinds of solids, such as aggregates and surfaces, occurs in a wide variety of settings of both fundamental and applied scientific interest. In this paper an exact solution for the detachment of adhesive spheres from each other by means of diffusion is presented. The solution takes into account repeated detachment and reattachment events in the course of time on the way toward the permanently separated state. For strongly adhesive spheres this state is approached in an exponential manner essentially regardless of how the bound state is specified. The analytical solution is shown to capture semiquantitatively the escape from more realistic potential wells using a mapping procedure whereby equality of second virial coefficients is imposed.

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Phys. Rev. E 97, 042610– Published 23 April, 2018
  • Received 23 January 2018
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