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 neighbouring 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.
|Original language||English (US)|
|Journal||Journal of Physics Condensed Matter|
|Issue number||8 A|
|State||Published - Dec 1 2000|
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics