Surface Nanobubbles in Nonaqueous Media: Looking for Nanobubbles in DMSO, Formamide, Propylene Carbonate, Ethylammonium Nitrate, and Propylammonium Nitrate
Surface Nanobubbles in Nonaqueous Media: Looking for Nanobubbles in DMSO, Formamide, Propylene Carbonate, Ethylammonium Nitrate, and Propylammonium Nitrate
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DOI：
10.1021/acsnano.5b02915
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发表时间：
2015-07-01
期刊：
影响因子：
17.1
通讯作者：
Craig, Vincent S. J.
中科院分区：
文献类型：
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作者：
An, Hongjie;Liu, Guangming;Craig, Vincent S. J.
在疏水表面上经常观察到由乙醇与水交换过程中的过饱和产生的表面纳米气泡，它们在数天内保持稳定，并且具有比宏观观察到的大得多的接触角。在这里，我们验证了纳米气泡也可以在非水溶剂中观察到的假设，以确定它们的异常寿命和接触角是否与溶剂的性质有关。在质子溶剂甲酰胺、硝酸乙铵和硝酸丙铵中可见纳米气泡，但在碳酸丙烯酯或二甲亚砜中未见纳米气泡。在溶剂中观察到纳米气泡表现出三维氢键网络。像在水系统中一样，纳米气泡可以稳定数天，并表现出高接触角（类似于165度）。
Surface nanobubbles produced by supersaturation during the exchange of ethanol for water are routinely observed on hydrophobic surfaces, are stable for days, and have contact angles that are very much greater than observed macroscopically. Here, we test the hypothesis that nanobubbles can also be observed in nonaqueous solvents in order to ascertain if their anomalous lifetimes and contact angles are related to properties of the solvent. Nanobubbles were seen in the protic solvents formamide, ethylammonium nitrate, and propylammonium nitrate, but not in propylene carbonate or dimethyl sulfoxide. Solvents in which nanobubbles were observed exhibit a three-dimensional hydrogen-bonding network. Like in aqueous systems, the nanobubbles were stable for days and exhibited high contact angles (similar to 165 degrees).