Metastable Nanobubbles | Zendy

Tapio Vehmas | Zendy; Lasse Makkonen | Zendy

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Metastable Nanobubbles

Author(s) -

Tapio Vehmas,

Lasse Makkonen

Publication year - 2021

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.0c05384

Subject(s) - metastability , dissolution , bubble , chemical physics , aqueous solution , materials science , microsecond , nanotechnology , surface energy , liquid bubble , chemical engineering , thermodynamics , chemistry , mechanics , physics , optics , composite material , engineering , organic chemistry

Water containing suspended nanobubbles is utilized in various applications. The observed lifetime of suspended nanobubbles is several weeks, whereas, according to the classical theory of bubble stability, a nanosized bubble should dissolve within microseconds. Explanations for the longevity of nanosized bubbles have been proposed but none of them has gained general acceptance. In this study, we derive an explanation for the existence of metastable nanobubbles solely from the thermodynamic principles. According to our analysis, the dissolution of nanosized aqueous bulk bubbles is nonspontaneous below 180 nm diameter due to the energy requirement of gas dissolution. Hydrophobic surfaces have a further stabilizing effect, and the dissolution becomes nonspontaneous in surface nanobubbles having a diameter below 600 nm.

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