Physics of Fluids, MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands.
Langmuir. 2011 Jul 19;27(14):8694-9. doi: 10.1021/la2005387. Epub 2011 Jun 16.
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 ∼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.
我们实验研究了在 PFDTS 涂层硅表面纳米气泡成核作为特定气体溶解在水中的功能。在每种情况下，我们限制自己在平衡条件下（c = 100%，T（液体）= T（衬底））。纳米气泡成核不仅是一个强烈的功能的气体类型，但也存在一个最佳的系统温度约 35-40°C 成核最大化，这是弱依赖于气体类型。我们还发现接触角是纳米气泡曲率半径的函数所有研究的气体类型。拟合这些数据，我们可以描述一个线张力，这是依赖于气体的类型，表明纳米气泡坐在吸附气体分子的顶部。平均线张力τ≈-0.8 nN。
