It can be described as the pH value at which the metal surface charge is zero,
meaning that at this pH the charge of the positive surface sites of Ag NPs are equal to the charge of the negative ones.There are different experimental methods for determining the PZC of a solid.
- M. Kosmulski, pH-dependent surface charging and points of zero charge II. Update, J. Colloid Interface Sci. 275 (2004) 214-224.
- M. Kosmulski, E. Maczka, E. Jartych, J.B. Rosenholm, Synthesis and characterization of goethite and goethite–hematite composite: experimental study and literature survey, Adv. Colloid Interfac. 103 (2003) 57-76.