期刊
LANGMUIR
卷 27, 期 14, 页码 8694-8699出版社
AMER CHEMICAL SOC
DOI: 10.1021/la2005387
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资金
- European Community [235873]
- Foundation for Fundamental Research on Matter (FOM)
- Netherlands Organization for Scientific Research (NWO)
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%, T-liquid = T-substrate). Not only is nanobubble nucleation a strong function of gas type, but there also exists an optimal system temperature of similar to 35 - 40 degrees 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 tau approximate to -0.8 nN.
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