Direct observation of charge inversion by multivalent ions as a universal electrostatic phenomenon

K. Besteman; M. A.G. Zevenbergen; H. A. Heering; S. G. Lemay

doi:10.1103/PhysRevLett.93.170802

Direct observation of charge inversion by multivalent ions as a universal electrostatic phenomenon

K. Besteman^*, M. A.G. Zevenbergen, H. A. Heering, S. G. Lemay

^*Corresponding author for this work

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Abstract

The study directly observed reversal of the polarity of charged surfaces in water upon the addition of trivalent and quadrivalent ions using atomic force microscopy. The charge inversion depends on the chemical composition, surface structure, size and lipophilicity of the ions and were sensitive to their valence. The study measures the force between two oppositely charged surface and its dependence on the properties of the screening ions. It was observed that the in the presence of a sufficiently high concentration of travalent and quadrivalent ions, the force reversibly changes signs.

Original language	English
Article number	170802
Pages (from-to)	170802-1-170802-4
Journal	Physical review letters
Volume	93
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.93.170802
Publication status	Published - 2 Oct 2004
Externally published	Yes

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AU - Heering, H. A.

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Direct observation of charge inversion by multivalent ions as a universal electrostatic phenomenon

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