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Massive generation of metastable bulk nanobubbles in water by external electric fields.

ABSTRACT: Nanobubbles (NBs) are nanoscopic gaseous domains than can exist on solid surfaces or in bulk liquids. They have attracted substantial attention due to their long-time (meta)stability and a high potential for real-world applications. Using an approach not previously investigated, we exploit surface-electrostatic NB formation and stabilization via application of external electric fields in gas-liquid systems, with the marked result of massively increased gas uptake into the liquid in NB form. The de facto gas solubility enhancement (over many months) ranges from 2.5-fold for oxygen to 30-fold for methane vis-à-vis respective Henry's law values for gas solubility; the more hydrophobic the gas, the more spectacular the increase. Molecular dynamics simulations reveal that the origin of NBs' movement lies in dielectrophoresis, while substantial NB stabilization arises from a surface-polarization interaction.

SUBMITTER: Ghaani MR

PROVIDER: S-EPMC7124953 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature

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Massive generation of metastable bulk nanobubbles in water by external electric fields.

Ghaani Mohammad Reza MR Kusalik Peter G PG English Niall J NJ

Science advances 20200403 14

Nanobubbles (NBs) are nanoscopic gaseous domains than can exist on solid surfaces or in bulk liquids. They have attracted substantial attention due to their long-time (meta)stability and a high potential for real-world applications. Using an approach not previously investigated, we exploit surface-electrostatic NB formation and stabilization via application of external electric fields in gas-liquid systems, with the marked result of massively increased gas uptake into the liquid in NB form. The ...[more]

PMID: 32284977

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