Surface Nanobubbles as a Function of Gas Type

Michiel A.J. van Limbeek, Michiel Antonius Jacobus van Limbeek, James Richard Thorley Seddon

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Abstract

We experimentally investigate the nucleation of surface nanobubbles on PFDTS-coated silicon as a function of the specific gas dissolved in water. In each case, we restrict ourselves to equilibrium conditions (c = 100%, Tliquid = Tsubstrate). Not only is nanobubble nucleation a strong function of gas type, but there also exists an optimal system temperature of 35 −40 °C where nucleation is maximized, which is weakly dependent on gas type. We also find that the contact angle is a function of the nanobubble radius of curvature for all gas types investigated. Fitting this data allows us to describe a line tension that is dependent on the type of gas, indicating that the nanobubbles sit on top of adsorbed gas molecules. The average line tension was τ ≈ −0.8 nN.
Original languageUndefined
Pages (from-to)8694-8699
Number of pages6
JournalLangmuir
Volume27
Issue number14
DOIs
Publication statusPublished - 2011

Keywords

  • METIS-277069
  • EC Grant Agreement nr.: FP7/235873
  • IR-79078

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