Counterion correlation in colloidal solutions
The detailed distribution of counterions close to colloidal particles (macroions) is a long-standing problem, with wide-ranging fundamental and practical implications. In particular, there is very little experimental data on the individual ion-ion interaction, although this interaction and the resulting ion correlation play an important role in biological processes. Such information could also help validate and refine certain assumptions made in theoretical and numerical studies of charged systems, e.g. in implicit solvent strategies. One often assumes that the interaction is accurately described by the DLVO model, which combines the electrostatic and van der Waals interactions, supplemented by steric repulsion. While this model has been very successful in explaining the interaction of macroscopic objects, its validity at the nanoscale is still in need of direct experimental verification.
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CONSTANTIN Doru; JUDEINSTEIN Patrick and SCHWEINS Ralf. (2013). Counterion correlation in colloidal solutions. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-10-1316