Specific Ion Effects: Why DLVO Theory Fails for Biology and Colloid Systems

M. Boström; D. R. M. Williams; B. W. Ninham

doi:10.1103/PhysRevLett.87.168103

Specific Ion Effects: Why DLVO Theory Fails for Biology and Colloid Systems

M. Boström, D. R. M. Williams, and B. W. Ninham

Phys. Rev. Lett. 87, 168103 – Published 1 October 2001

Abstract

The classical Derjaguin-Landau-Verwey-Overbeek theory that underpins colloid and surface science is shown to be flawed, especially at biological salt concentrations. This is in part because the dispersion forces acting on the ions are ignored. When these are included properly very different results are obtained. These results have substantial implications for biological and for ordinary colloid systems at moderate salt concentrations.

Received 30 May 2001

DOI:https://doi.org/10.1103/PhysRevLett.87.168103

Authors & Affiliations

M. Boström, D. R. M. Williams, and B. W. Ninham^*

Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Institute of Advanced Studies, Australian National University, Canberra, Australia 0200