Taming Electrowetting Using Highly Concentrated Aqueous Solutions.
Taming Electrowetting Using Highly Concentrated Aqueous Solutions.
复制标题
DOI：
10.1021/acs.jpcc.2c06517
复制
发表时间：
2022-12-15
影响因子：
3.7
通讯作者：
Dryfe, Robert A. W.
中科院分区：
文献类型：
--
作者：
Papaderakis, Athanasios A.;Polus, Kacper;Kant, Pallav;Box, Finn;Etcheverry, Bruno;Byrne, Conor;Quinn, Martin;Walton, Alex;Juel, Anne;Dryfe, Robert A. W.
碳表面的润湿是最普遍但知之甚少的物理现象之一。对润湿性能的控制是水储能装置和碳基过滤系统运行的基础。电润湿，即接触角随施加电势的变化，是引入润湿控制的最直接的方式。在这里，我们研究直接在石墨表面上的电润湿与使用的水性电解质显示，可逆的润湿控制可以实现和定量地理解使用模型的界面电容。我们表明，使用高浓度的电解质水溶液诱导一个完全对称和可逆的润湿行为没有降解的基板在前所未有的潜在窗口2.8 V，我们证明了经典的“杨-李普曼”模型适用，并打破，并讨论后者的原因，建立所施加的偏压，电解质浓度和所得的接触角之间的关系。该方法被扩展到在液体的电润湿|液体界面，其中浓缩的水性电解质可逆地驱动绝缘有机相的电润湿响应，具有显著降低的电势阈值。总之，本研究强调了高浓度水性电解质对碳表面电润湿性的有益影响，这与碳基水性储能系统以及电子和微流体装置的性能直接相关。
Wetting of carbon surfaces is one of the most widespread, yet poorly understood, physical phenomena. Control over wetting properties underpins the operation of aqueous energy-storage devices and carbon-based filtration systems. Electrowetting, the variation in the contact angle with an applied potential, is the most straightforward way of introducing control over wetting. Here, we study electrowetting directly on graphitic surfaces with the use of aqueous electrolytes to show that reversible control of wetting can be achieved and quantitatively understood using models of the interfacial capacitance. We manifest that the use of highly concentrated aqueous electrolytes induces a fully symmetric and reversible wetting behavior without degradation of the substrate within the unprecedented potential window of 2.8 V. We demonstrate where the classical “Young–Lippmann” models apply, and break down, and discuss reasons for the latter, establishing relations among the applied bias, the electrolyte concentration, and the resultant contact angle. The approach is extended to electrowetting at the liquid|liquid interface, where a concentrated aqueous electrolyte drives reversibly the electrowetting response of an insulating organic phase with a significantly decreased potential threshold. In summary, this study highlights the beneficial effect of highly concentrated aqueous electrolytes on the electrowettability of carbon surfaces, being directly related to the performance of carbon-based aqueous energy-storage systems and electronic and microfluidic devices.
登录
查看更多内容
影响因子：
17.1
作者：
Li, Zhiting;Kozbial, Andrew;Liu, Haitao
通讯作者：
Liu, Haitao
影响因子：
0.8
作者：
Asanov, IP;Paasonen, VM;Nazarov, AS
通讯作者：
Nazarov, AS
影响因子：
1.9
作者：
Groult, H;Durand-Vidal, S;Lantelme, F
通讯作者：
Lantelme, F
影响因子：
3.9
作者：
Groult, H;Devilliers, D;Nicolas, F
通讯作者：
Nicolas, F
影响因子：
17.6
作者：
Hou, Ruilin;Wang, Yue;Yan, Xingbin
通讯作者：
Yan, Xingbin