Issue 31, 2021

Can bulk nanobubbles be stabilized by electrostatic interaction?

Abstract

It has been suggested that electrostatic stress arising from charges accumulated at the surface of nanobubbles might balance Laplace pressure leading to their stability. This mechanism has been widely discussed in the nanobubble field for the past decade. However, the stress in the diffusive double layer was overlooked when calculating the electrostatic effect in previous theories. In this communication, we recalculated this effect using the classical double layer theory. Combined with experimentally measured zeta potential, we find that the ratio of electrostatic pressure to Laplace pressure is much less than 10−2, which suggests that electrostatic interaction may not be the main factor for stabilizing bulk nanobubbles.

Graphical abstract: Can bulk nanobubbles be stabilized by electrostatic interaction?

Supplementary files

Article information

Article type
Communication
Submitted
23 Mar 2021
Accepted
13 Jul 2021
First published
13 Jul 2021

Phys. Chem. Chem. Phys., 2021,23, 16501-16505

Can bulk nanobubbles be stabilized by electrostatic interaction?

S. Wang, L. Zhou and Y. Gao, Phys. Chem. Chem. Phys., 2021, 23, 16501 DOI: 10.1039/D1CP01279G

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