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The European Physical Journal E

, Volume 10, Issue 2, pp 115–121 | Cite as

Measuring a colloidal particle's interaction with a flat surface under nonequilibrium conditions

Total internal reflection microscopy with absolute position information
  • S.H. Behrens
  • J. Plewa
  • D.G. Grier

Abstract:

A new and general approach is proposed to analyze the dynamics of a colloidal particle interacting with a nearby wall. This analysis can be used to determine the acting forces even when the system is non-stationary. As an illustration, we use total internal reflection microscopy to investigate the forces acting on a polystyrene sulfate latex particle as it is receding from a charged glass surface.

PACS. 82.70.Dd Colloids – 05.40.-a Fluctuation phenomena, random processes, noise, and Brownian motion 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2003

Authors and Affiliations

  • S.H. Behrens
    • 1
  • J. Plewa
    • 1
  • D.G. Grier
    • 1
  1. 1.Dept. of Physics, James Franck Institute, and Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL 60637, USAUS

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