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Interactions between silica particles in the presence of multivalent coions

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Published in Soft Matter. 2017, vol. 13, no. 34, p. 5741-5748
Abstract Forces between charged silica particles in solutions of multivalent coions are measured with colloidal probe technique based on atomic force microscopy. The concentration of 1 : z electrolytes is systematically varied to understand the behavior of electrostatic interactions and double-layer properties in these systems. Although the coions are multivalent the Derjaguin, Landau, Verwey, and Overbeek (DLVO) theory perfectly describes the measured force profiles. The diffuse-layer potentials and regulation properties are extracted from the forces profiles by using the DLVO theory. The dependencies of the diffuse-layer potential and regulation parameter shift to lower concentration with increasing coion valence when plotted as a function of concentration of 1 : z salt. Interestingly, these profiles collapse to a master curve if plotted as a function of monovalent counterion concentration.
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Other version: http://xlink.rsc.org/?DOI=C7SM01168G
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Research group Groupe Borkovec
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STOJIMIROVIC, Biljana, VALMACCO, Valentina, TREFALT, Gregor. Interactions between silica particles in the presence of multivalent coions. In: Soft Matter, 2017, vol. 13, n° 34, p. 5741-5748. https://archive-ouverte.unige.ch/unige:102860

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Deposited on : 2018-03-12

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