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Counterion condensation in hydrosols of single-crystalline detonation nanodiamond particles obtained by air annealing of their agglomerates

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Abstract

The pattern of previously recorded dependences of the specific surface charge and electrophoretic mobility of monodisperse detonation nanodiamond particles on pH of aqueous KCl solutions suggests that counterions are condensed on the particle surface. Counterion condensation is considered in terms of the Levin model, and the experimental ratios between the densities of the electrokinetic and surface charges of dispersed particles, as well as the fractions of condensed counterions, are calculated as depending on pH and KCl concentration in nanodiamond hydrosols. The obtained dependences lead to the conclusion that counterion condensation on the surface of detonation nanodiamond particles does indeed take place.

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Authors and Affiliations

  1. Ioffe Physical Technical Institute, St. Petersburg, 194021, Russia

    A. V. Shvidchenko & A. T. Dideikin

  2. St. Petersburg State University, St. Petersburg, 199024, Russia

    A. N. Zhukov

Authors
  1. A. V. Shvidchenko
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  2. A. T. Dideikin
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  3. A. N. Zhukov
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Correspondence to A. N. Zhukov.

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Original Russian Text © A.V. Shvidchenko, A.T. Dideikin, A.N. Zhukov, 2017, published in Kolloidnyi Zhurnal, 2017, Vol. 79, No. 4, pp. 521–524.

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Shvidchenko, A.V., Dideikin, A.T. & Zhukov, A.N. Counterion condensation in hydrosols of single-crystalline detonation nanodiamond particles obtained by air annealing of their agglomerates. Colloid J 79, 567–569 (2017). https://doi.org/10.1134/S1061933X17040147

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  • DOI: https://doi.org/10.1134/S1061933X17040147

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