Interfacial Ordering and Accompanying Divergent Capacitance at Ionic Liquid-Metal Interfaces.
Interfacial Ordering and Accompanying Divergent Capacitance at Ionic Liquid-Metal Interfaces.
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DOI：
10.1103/physrevlett.115.256102
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发表时间：
2015-06
影响因子：
8.6
通讯作者：
David T. Limmer
中科院分区：
文献类型：
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作者：
David T. Limmer
对靠近带电平面壁的密集离子溶液建立了一个理论，该理论适用于强离子间相关性。该理论预测了在无序体溶液存在的情况下，界面处会出现波动诱导的一阶跃迁和自发电荷密度有序。表面排序是由施加的电压驱动的，并导致异常的差分电容，这与最近的模拟结果一致，与广泛的系统的实验观察一致。给出了电荷密度分布和电容的显式表达式。将该理论与电荷受挫Ising模型的数值结果进行了比较，发现该模型也表现出电压驱动的一阶跃迁。
A theory is constructed for dense ionic solutions near charged planar walls that is valid for strong interionic correlations. This theory predicts a fluctuation-induced, first-order transition and spontaneous charge density ordering at the interface, in the presence of an otherwise disordered bulk solution. The surface ordering is driven by applied voltage and results in an anomalous differential capacitance, in agreement with recent simulation results and consistent with experimental observations of a wide array of systems. Explicit forms for the charge density profile and capacitance are given. The theory is compared with numerical results for the charge frustrated Ising model, which is also found to exhibit a voltage driven first-order transition.