Knudsen gas provides nanobubble stability.
Phys Rev Lett
; 107(11): 116101, 2011 Sep 09.
Article
em En
| MEDLINE
| ID: mdl-22026686
ABSTRACT
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 â¼3.3 m/s, in good agreement with our experimental atomic force microscopy measurement of â¼2.7 m/s. In addition, our model also predicts an upper bound for the size of nanobubbles, which is consistent with the available experimental data.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Nanoestruturas
/
Gases
Tipo de estudo:
Prognostic_studies
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article