Direct Observation of a Nonequilibrium Electro-Osmotic Instability
Direct Observation of a Nonequilibrium Electro-Osmotic Instability
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DOI：
10.1103/physrevlett.101.236101
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发表时间：
2008-12-05
影响因子：
8.6
通讯作者：
Wessling, M.
中科院分区：
文献类型：
--
作者：
Rubinstein, S. M.;Manukyan, G.;Wessling, M.
我们提出了一个可视化的预测不稳定的离子传导从二元电解质到电荷选择性固体。当大于临界电压的电压施加到两侧为铜阳极和阳离子选择性膜的硫酸铜薄层上时，这种不稳定性会发展。电流-电压依赖性在极限电流处表现出饱和。随着电压的进一步增加，电流增加，标志着过渡到超限电导。这种转变是介导的出现涡流增加所施加的电压。
We present a visualization of the predicted instability in ionic conduction from a binary electrolyte into a charge selective solid. This instability develops when a voltage greater than critical is applied to a thin layer of copper sulfate flanked by a copper anode and a cation selective membrane. The current-voltage dependence exhibits a saturation at the limiting current. With a further increase of voltage, the current increases, marking the transition to the overlimiting conductance. This transition is mediated by the appearing vortical flow that increases with the applied voltage.