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The size, charge, and electrokinetic potential of gold nanoparticles in solutions of sodium bis(2-ethylhexyl) sulfosuccinate in n-decane-chloroform mixtures

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Abstract

The hydrodynamic diameters and electrokinetic potentials of gold nanoparticles in n-decane, chloroform, and mixtures thereof have been studied as functions of sodium bis(2-ethylhexyl) sulfosuccinate (AOT) concentration. At AOT concentrations in n-decane below 2 mM, gold nanoparticles are covered with AOT monolayer and do not reveal electrophoretic mobility. At a concentration of 0.3 M that, according to the data of photon-correlation spectroscopy, corresponds to the onset of adsorption of AOT micelles on the nanoparticle surface, the ζ-potential reaches a maximum value of 190 mV; then, it decreases with increasing surfactant concentration. A rise in the volume fraction of chloroform in decane-chloroform mixtures drastically increases the ζ-potential even at low AOT concentrations. The obtained results have been analyzed in terms of the Debye-Hückel theory.

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Authors and Affiliations

  1. Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 3, Novosibirsk, 630090, Russia

    P. S. Popovetskiy, A. I. Bulavchenko, M. G. Demidova & T. Yu. Podlipskaya

Authors
  1. P. S. Popovetskiy
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  2. A. I. Bulavchenko
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  3. M. G. Demidova
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  4. T. Yu. Podlipskaya
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Correspondence to P. S. Popovetskiy.

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Original Russian Text © P.S. Popovetskiy, A.I. Bulavchenko, M.G. Demidova, T.Yu. Podlipskaya, 2015, published in Kolloidnyi Zhurnal, 2015, Vol. 77, No. 1, pp. 65–72.

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Popovetskiy, P.S., Bulavchenko, A.I., Demidova, M.G. et al. The size, charge, and electrokinetic potential of gold nanoparticles in solutions of sodium bis(2-ethylhexyl) sulfosuccinate in n-decane-chloroform mixtures. Colloid J 77, 58–64 (2015). https://doi.org/10.1134/S1061933X14060131

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  • DOI: https://doi.org/10.1134/S1061933X14060131

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