Surface nanobubbles as a function of gas type

Abstract

We experimentally investigate the nucleation of surface nanobubbles on PFDTS-coated silicon as a function of the specific gas dissolved in the water. In each case we restrict ourselves to equilibrium conditions ($c=100$, $T_{liquid}=T_{substrate}$). Not only is nanobubble nucleation a strong function of gas type, but there also exists an optimal system temperature of $\sim 35-40{}^{\mathrm{o}}\mathrm{C}$ where nucleation is maximized, which is weakly dependent on gas type. We also find that contact angle is a function of nanobubble radius of curvature for all gas types investigated. Fitting this data allows us to describe a line tension which is dependent on the type of gas, indicating that the nanobubbles are sat on top of adsorbed gas molecules. The average line tension was $\tau \sim -0.8\mathrm{nN}$.

References in corpus (4)

• Dynamic equilibrium Mechanism for Surface Nanobubble Stabilization
• Origin of line tension for a Lennard-Jones nanodroplet
• Superstability of Surface Nanobubbles
• Surface bubble nucleation phase space

Cited by in corpus (4)

• Knudsen gas provides nanobubble stability
• Formation of surface nanobubbles and universality of their contact angles: A molecular dynamics approach
• Surface Nanobubbles: Theory, Simulation, and Experiment. A Review
• A review of recent theoretical and computational studies on pinned surface nanobubbles