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APS » Journals » Phys. Rev. Lett. » Volume 87 » Issue 16
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Phys. Rev. Lett. 87, 168103 (2001) [4 pages]

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

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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

Received 30 May 2001; published 1 October 2001

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.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.168103
DOI:
10.1103/PhysRevLett.87.168103
PACS:
87.15.Rn, 82.70.Dd, 82.45.Tv

*Present address: Malmö University, School of Technology and Society, SE-205 06 Malmö, Sweden.

 
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