Surface Potential Measurement: Zeta Potential

This lecture covers the measurement of surface potential, focusing on zeta potential and its calculation from electrophoretic mobility or acoustophoresis. It explains the concept of the slip plane, isoelectric point, and point of zero charge. The Gouy-Chapman-Stern model and the factors affecting the double layer are discussed. The lecture also delves into the DLVO theory, interaction forces in colloidal systems, and the aggregation kinetics of colloidal suspensions. The presentation concludes with the evaluation of colloidal stability, critical coagulation concentration, and the Hamaker model for assessing stability against agglomeration.