Double-layer interaction between spheres with unequal surface potentials

Abstract

After a qualitative and quantitative comparison of various methods for calculating double-layer interaction the results of Hogg, Healy and Fuerstenau and those of Barouch, Matijević and coworkers on the energy of interaction between unequal spheres are dealt with. These results show unexpectedly large differences. The cause of these differences is found and after application of a necessary correction to the results of Barouch and Matijević the remaining differences are small, even for moderately large surface potentials.