Electrokinetics, Stabilization and Aggregation
3 important questions on Electrokinetics, Stabilization and Aggregation
How to Measure Zeta Potential?
Electrophoresis is a good start. This is the motion of a particle under an electric field. If you can measure how fast the particle moves under an applied field, you should know the zeta potential
Measuring Zeta Potentiel.
Practically, this often is done with dynamic light scattering + applied electrodes. This also allows for particle size to be determined (or hydrodynamic radius anyway). If the particle has a radius of R, the hydrodynamic radius is a bit larger (nm scale) relating to the size of the double layer/salt concentration.
WHat makes measuring the Zeta potential challenging?
we need a perfectly flat interface, we need to know the flow profile exactly (we are using an equation based on electro-osmosis for flat plates)
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