**David G. Grier**

Measured pair interactions among
highly charged colloidal spheres dispersed in
simple electrolytes yield several surprises.
Isolated pairs of like-charged spheres are found
to repel each other, much as predicted by
conventional theory. The same spheres, however,
can develop a strong and long-ranged attraction
for each other when confined either by charged
glass walls, or by neighboring spheres.
Such like-charge attractions are inconsistent
with the mean field theory for macroionic interactions.
These and other experimental observations further
constrain recently proposed extensions to the mean field theory.

- Introduction: The Mean Field Theory for Macroionic Interactions
- Repulsions Between Isolated Pairs of Colloidal Spheres
- Attractions Between Confined Pairs of Spheres
- Metastability of Superheated Colloidal Crystals
- Failure of Linear Superposition in Equilibrium Crystals
- Discussion
- Acknowledgements
- Bibliography
- About this document ...