Pinning Down the Reasons for the Size, Shape, and Stability of Nanobubbles
Pinning Down the Reasons for the Size, Shape, and Stability of Nanobubbles
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DOI：
10.1021/acs.langmuir.6b01563
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发表时间：
2016-11-01
期刊：
影响因子：
3.9
通讯作者：
Attard, Phil
中科院分区：
文献类型：
--
作者：
Attard, Phil
纳米气泡的大小，形状和稳定性的热力学分析进行了修改经典成核理论，包括过饱和依赖的表面张力。结果表明，纳米气泡的自由能是一个最小的临界半径时，接触线被钉扎，纳米气泡的大小是由过饱和度引起的表面张力的降低，并在一起，这些解释了增加的外部接触角的纳米气泡相比，在同一表面上的宏观气泡或液滴的相应角度。
A thermodynamic analysis of the size, shape, and stability of nanobubbles is carried out by modifying classical nucleation theory to include the supersaturation dependence of the surface tension. It is shown that the free energy of a nanobubble is a minimum at the critical radius when the contact line is pinned, that the size of the nanobubble is determined by the decrease in the surface tension caused by the degree of supersaturation, and that together these explain the increased exterior contact angle of a nanobubble compared with the corresponding angle of a macroscopic bubble or droplet on the same surface.