The colloidal domain is composed of particles for which the dominant length scale ranges from tens of nanometers to tens of microns. In such systems, because the surface to volume ratio is extremely large, i.e. on the order of 108 cm-1, interfacial phenomena dictate macroscopic system behavior. The chemistry and physics required to describe the behavior of these systems are of paramount importance and find engineering significance in fields as diverse as drug delivery, water treatment, semiconductor processing, biology, and nanotechnology.