Kuo Y.-C.Hsu J.-P.2019-05-202019-05-2019980303402Xhttps://scholars.lib.ntu.edu.tw/handle/123456789/409413The unsteady-state potential and space charge distributions between two identical, planar parallel charged surfaces immersed in an c:b electrolyte solution are examined theoretically. The effects of the ratio of the diffusivities of counterions and coions, Dcon/Dco, the mean diffusivity (DconDco)1/2, and the separation distance between two surfaces, H, on the transient distributions of electrical potential and space charges are investigated. The result of numerical simulation reveals that the extent of a system to reach its new equilibrium state depends largely on the magnitude of a scaled time v(=Dt£e2). For a fixed H, the greater the value of v, the closer a system to its new equilibrium state. For constant H and v, the smaller the ratio (Dcon/Dco), the greater the deviation of a system from its new equilibrium state. In addition, the effect of Dcon on this deviation is greater than that of Dco.Electrical double layerElectrical interactionsNon-equilibrium potential distributionPoisson equationjournal article10.1007/s0039600502312-s2.0-0012960605https://www.scopus.com/inward/record.uri?eid=2-s2.0-0012960605&doi=10.1007%2fs003960050231&partnerID=40&md5=2365d37f7d6357d62dd4a79c80fee3ad