Knudsen gas provides nanobubble stability

Knudsen gas provides nanobubble stability

We provide a model for the remarkable stability of surface nanobubbles to bulk dissolution. The key to the solution is that the gas in a nanobubble is of Knudsen type. This leads to the generation of a bulk liquid flow which effectively forces the diffusive gas to remain local. Our model predicts th...

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Veröffentlicht in:Physical review letters 2011-09, Vol.107 (11), p.116101-116101, Article 116101
Hauptverfasser: Seddon, James R T, Zandvliet, Harold J W, Lohse, Detlef
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Sprache:eng
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Gases - chemistry
Imaging, Three-Dimensional
Microscopy, Atomic Force
Nanostructures - chemistry
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container_end_page 116101
container_issue 11
container_start_page 116101
container_title Physical review letters
container_volume 107
creator Seddon, James R T
Zandvliet, Harold J W
Lohse, Detlef
description We provide a model for the remarkable stability of surface nanobubbles to bulk dissolution. The key to the solution is that the gas in a nanobubble is of Knudsen type. This leads to the generation of a bulk liquid flow which effectively forces the diffusive gas to remain local. Our model predicts the presence of a vertical water jet immediately above a nanobubble, with an estimated speed of ∼3.3  m/s, in good agreement with our experimental atomic force microscopy measurement of ∼2.7  m/s. In addition, our model also predicts an upper bound for the size of nanobubbles, which is consistent with the available experimental data.
doi_str_mv 10.1103/PhysRevLett.107.116101
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subjects Gases - chemistry
Imaging, Three-Dimensional
Microscopy, Atomic Force
Nanostructures - chemistry
title Knudsen gas provides nanobubble stability
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