Measuring a colloidal particle's interaction with a flat surface under nonequilibrium conditions. Total internal reflection microscopy with absolute position information.
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.
Behrens
S H
SH
Dept. of Physics, James Franck Institute, and Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL 60637, USA.
Plewa
J
J
Grier
D G
DG