Dynamics of the electric double layer:: Analysis in the frequency and time domains
Dynamics of the electric double layer:: Analysis in the frequency and time domains
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DOI：
10.1006/jcis.2000.6941
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发表时间：
2000-08-01
影响因子：
9.9
通讯作者：
Delgado, AV
中科院分区：
文献类型：
--
作者：
López-García, JJ;Horno, J;Delgado, AV
没有严格的理论动电现象是可以想象的，而不适当的帐户双电层极化作用下的外部领域。由于导致这种极化的过程需要有限的时间来发展，因此对作为时间函数的感兴趣的量（电势和离子浓度分布、粒子或流体速度等）的行为的分析应该是非常说明性的。在这项工作中，我们分析了如何在纳秒到微秒的时间范围内的电场的应用程序后，这些量的演变。提出了一种网络方法，基本上是用电路模拟程序来求解所涉及的微分方程，在用通量和力对其进行适当的解释之后，以获得关于电势、对流和共离子扰动、粒子速度和流体速度分布随时间的演化的信息。首先在频域中检验该方法的性能，对于频域，存在严格的解，然后在时域中使用该过程。原因进行了讨论所观察到的分析量的时间依赖性。(C)北京大学出版社.
No rigorous theory of electrokinetic phenomena is conceivable without properly accounting for double layer polarization under the action of external fields. Since processes leading to such polarization need a finite time to develop, an analysis of the behavior of the quantities of interest (potential and ion concentration profiles, particle or fluid velocity, and so on) as a function of time should be extremely illustrative. In this work, we analyze how those quantities evolve in the nanosecond to microsecond time range after the application of an electric field. The network method is proposed tin which, essentially, an electric circuit simulator program is used to solve the differential equations involved, after their proper interpretation in terms of fluxes and forces) to gain information about the evolution with time of the potential, counterion, and co-ion perturbations, the particle velocity, and the fluid velocity profile. The performance of the method is first ckecked in the frequency domain, for which rigorous solutions exist, and then the procedure is used in the time domain. Reasons are discussed for the observed time dependencies of the analyzed quantities. (C) 2000 Academic Press.