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Massive generation of metastable bulk nanobubbles in water by external electric fields
Science Advances ( IF 11.7 ) Pub Date : 2020-04-03 , DOI: 10.1126/sciadv.aaz0094
Mohammad Reza Ghaani 1 , Peter G. Kusalik 2 , Niall J. English 1
Affiliation  

Nanobubbles (NBs) are nanoscopic gaseous domains than can exist on solid surfaces or in bulk liquids. They have attracted substantial attention due to their long-time (meta)stability and a high potential for real-world applications. Using an approach not previously investigated, we exploit surface-electrostatic NB formation and stabilization via application of external electric fields in gas-liquid systems, with the marked result of massively increased gas uptake into the liquid in NB form. The de facto gas solubility enhancement (over many months) ranges from 2.5-fold for oxygen to 30-fold for methane vis-à-vis respective Henry’s law values for gas solubility; the more hydrophobic the gas, the more spectacular the increase. Molecular dynamics simulations reveal that the origin of NBs’ movement lies in dielectrophoresis, while substantial NB stabilization arises from a surface-polarization interaction.



中文翻译:

外部电场在水中大量生成亚稳态块状纳米气泡

纳米气泡(NB)是纳米级的气态域,其存在于固体表面或散装液体中。由于它们的长期(亚)稳定性和在实际应用中的巨大潜力,它们引起了广泛的关注。使用以前未研究的方法,我们通过在气液系统中施加外部电场来利用表面静电NB的形成和稳定化,其显着结果是大量吸收了NB形式的气体。相对于气体溶解度的相应亨利定律,事实上的气体溶解度提高(数月之久)从氧气的2.5倍到甲烷的30倍不等。气体疏水性越强,增加的幅度就越大。分子动力学模拟表明,NBs运动的起源在于介电泳,

更新日期:2020-04-06
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