期刊
NANOSCALE
卷 12, 期 44, 页码 22698-22709出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nr05859a
关键词
-
类别
资金
- European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013)/ERC grant [339446]
- European Research Council under the European Union's Horizon 2020 Research and Innovation Programme [803213]
- project HPC-EUROPA3 [INFRAIA-2016-1-730897]
- EC Research Innovation Action under the H2020 Programme' [HPC174LQMN]
- SMART Fellowship
- Joint Research Programme of the National Natural Science Foundation of China [11861131005]
- Deutsche Forschungsgemeinschaft [OH 75/3-1]
- Sapienza University of Rome [RG11715C81D4F43C]
- European Research Council (ERC) [803213] Funding Source: European Research Council (ERC)
Surface nanobubbles are gaseous domains found at immersed substrates, whose remarkable persistence is still not fully understood. Recently, it has been observed that the formation of nanobubbles is often associated with a local high gas oversaturation at the liquid-solid interface. Tan, An and Ohl have postulated the existence of an effective potential attracting the dissolved gas to the substrate and producing a local oversaturation within 1 nm from it that can stabilize nanobubbles by preventing outgassing in the region where gas flow would be maximum. It is this effective solid-gas potential - which is not the intrinsic, mechanical interaction between solid and gas atoms - its dependence on chemical and physical characteristics of the substrate, gas and liquid, that controls the stability and the other characteristics of surface nanobubbles. Here, we perform free energy atomistic calculations to determine, for the first time, the effective solid-gas interaction that allows us to identify the molecular origin of the stability and other properties of surface nanobubbles. By combining the Tan-An-Ohl model and the present results, we provide a comprehensive theoretical framework allowing, among others, the interpretation of recent unexplained experimental results, such as the stability of surface nanobubbles in degassed liquids, the very high gas concentration in the liquid surrounding nanobubbles, and nanobubble instability in organic solvents with high gas solubility.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据