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Issue 7, 2009
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The hydrophobic effect as a driving force for charge inversion in colloids

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Abstract

A new mechanism for charge inversion of colloids in electrolyte solutions based on the hydrophobic effect is presented. We show that this mechanism is able to induce charge inversion at low concentrations (∼mM) of monovalent ions containing hydrophobic functional groups and present for the first time experimental evidence of this prediction. We provide a simple mean field theoretical model that successfully describes the experimental data up to charge inversion. Saturation effects appearing at higher concentrations are also discussed.

Graphical abstract: The hydrophobic effect as a driving force for charge inversion in colloids

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Publication details

The article was received on 17 Nov 2008, accepted on 03 Feb 2009 and first published on 16 Feb 2009


Article type: Communication
DOI: 10.1039/B820489F
Citation: Soft Matter, 2009,5, 1350-1353
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    The hydrophobic effect as a driving force for charge inversion in colloids

    A. Martín-Molina, C. Calero, J. Faraudo, M. Quesada-Pérez, A. Travesset and R. Hidalgo-Álvarez, Soft Matter, 2009, 5, 1350
    DOI: 10.1039/B820489F

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