电解质混合物中的溶剂渗流
Solvo-osmotic flow in electrolytic mixtures
摘要：
我们表明，一个电场平行于电中性表面可以产生流动的电解质混合物在小通道。我们称之为溶剂渗透流，因为流动是由离子在液-固界面的不对称优先溶剂化引起的。所产生的流量是可比的大小无处不在的电渗流在带电表面，但对于一个固定的表面电荷密度，它的依赖性离子强度的定性不同。溶剂渗透流动也可以用温度敏感地控制。我们推导出一个修改后的Helmholtz-Smoluchowski方程，占这些影响。
英文摘要：
We show that an electric field parallel to an electrically neutral surface can generate flow of electrolytic mixtures in small channels. We term this solvo-osmotic flow, since the flow is induced by the asymmetric preferential solvation of ions at the liquid-solid interface. The generated flow is comparable in magnitude to the ubiquitous electro-osmotic flow at charged surfaces, but for a fixed surface charge density, it differs qualitatively in its dependence on ionic strength. Solvo-osmotic flow can also be sensitively controlled with temperature. We derive a modified Helmholtz-Smoluchowski equation that accounts for these effects.
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