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Measurement of surface charge densities on Brownian particles using total internal reflection microscopy
2001
Journal of Chemical Physics
Due to double-layer forces a charged colloid suspended in an electrolyte is repelled from a like-charged planar wall. We demonstrate that and how a precise measurement of these double-layer forces acting on a colloid near a glass surface can be used to determine surface charge densities. The effective wall-colloid potentials are measured using the total internal reflection microscopy technique, and a whole series of such potentials, taken for various different salt concentrations, are then
doi:10.1063/1.1371556
fatcat:qq6mt7q3xbbind4s6vmlt7oo7i