Many-Body Electrostatic Forces Between Colloidal Particles at Vanishing Ionic Strength
Jason W. Merrill, Sunil K. Sainis, and Eric R. Dufresne
Physical Review Letters 103 (2009) 138301
wiki entry by Emily Russell, Fall 2010
The article can be found here.
Overview and Comments
This paper reports a striking demonstration that effective pair potentials do not tell the full story in colloidal systems, and that furthermore, a constant surface potential is a better model than a constant surface charge, at least in some cases.