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Characteristics of an Electrical Double Layer of Bulk Nanobubles in Water

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Abstract

When analyzing the characteristics of the electrical double layer of bulk nanobubbles in water, the conditions for the existence of their Stern layer are found. It is taken into account that the surface of the bubble is surrounded by a thin layer of “bound” water, on top of which the counterions of the Stern layer are placed. The stability of this layer depends on two factors: the minimization of the Gibbs energy of counterions in the diffuse layer and the energy of their thermal motion, which is capable of pulling the counterion out of the Stern layer and returning it to the region of the diffuse layer. The charge of nanobubbles has been determined, which corresponds to both the minimum Gibbs energy of counterions and the thermal stability of the Stern layer. The dependence of the critical radius of the stable Stern layer on the concentration of dissolved salts is determined.

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Funding

The work was supported by the Ministry of Science and Higher Education of the Russian Federation (State Assignment no. 121112200122-7).

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  1. Institute of Applied Mechanics of Russian academy of Science (IAM RAS), 125040, Moscow, Leningradskiy prospect, 7/1, Russia

    Yu. K. Levin

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Correspondence to Yu. K. Levin.

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Levin, Y.K. Characteristics of an Electrical Double Layer of Bulk Nanobubles in Water. Colloid J 85, 418–422 (2023). https://doi.org/10.1134/S1061933X2360029X

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