Double layer (surface science) - Wikipedia
In surface science, a double layer (DL, also called an electrical double layer, EDL) is a structure that appears on the surface of an object when it is exposed to a fluid. The object might be a solid particle, a gas bubble, a liquid droplet, or a porous body. The DL refers to two parallel layers of charge surrounding the object.
“双电层”理论的三个模型 - 知乎 - 知乎专栏
双电层（ electrical double layer ） 假设，将一个金属片放进电解液中，那么会发生什么呢？更准确地描述是： 在电极与电解液的界面处，物质与电荷的分布状态是怎样的？ （1）Helmholtz模型
亥姆霍兹层 - 百度百科
298K时Z－Z型 电解质溶液 中分散层的有效厚度为P/ETP 厘米,式中C为电解质浓度；Z为离子价数。 当电极与溶液接触时，由于荷电质点 (电子或离子)在两相之间转移，或是通过外电路向电极界面两侧充电，都会在两相中分别引起过剩电荷。 这些过剩电荷分布在界面两侧的薄层中，就形成了电化学双层，简称双层。
"Electrostatic Double Layer Repulsion" : for charged particles, this force arises from a diffuse, highly mobile surface layer of counterions; an exponential repulsion exists
Chapter13：双电层结构及吸附 - 知乎 - 知乎专栏
亥姆霍兹姆 最先提出带电电极浸入电解液中将排斥同种电荷并将吸引异种电荷到电极表面， 两层具有相反极性的电荷组成了电极与电解液界面间的双电层，并且两层之间间隔为分子距离级别，如图 (a)。 但是 该模型没有考虑到溶液中离子的混合/扩散、 离子吸附 以及溶剂与电极间的相互作用。 注：最初的亥姆霍兹姆双电层结构就如同平板电容器，其内部储存的电荷密度同 压降 的关系为： 因此该模型预测 微分电容 与电荷密度无关，为一常数，而取决于溶剂电解质 介电常数 以及 …
Helmholtz Layer - an overview | ScienceDirect Topics
To summarize, the double layer consists of three constituents: (a) An inner layer (inner Helmholtz layer) in which the potential changes linearly with the distance comprises the adsorbed water molecules and sometimes the specifically adsorbed anions. (b) An outer Helmholtz layer.
双电层理论 - 知乎 - 知乎专栏
双电层理论 研究的是电极-溶液界面结构。 它本质上是 界面化学 （物理）。 在纯 \alpha 相和纯 \beta 相之间存在 过渡区域。 A-A'界面和B-B'界面为该过渡区域边界。 我们以过渡区域中任意一虚线处为两相分界面，溶质在分界面处浓度会和体相浓度不同，存在表面过剩现象（surface excess）。 Gibbs 表面吸附方程 描述了界面处表面张力与溶质吸附情况的关系。 The Gibbs Adsorption Isotherm. \gamma ：表面张力； \Gamma ：surface excess concentration; 溶剂在 …
The Electrical Double Layer | Department of Chemical …
The model which gave rise to the term 'electrical double layer' was first put forward in the 1850's by Helmholtz. In this model he assumed that no electron transfer reactions occur at the electrode and the solution is composed only of electrolyte.
The Helmholtz model | Journal of Solid State Electrochemistry
2024年2月29日 · Helmholtz formulated the definition of a double layer in 1853. It was in 1874 that Helmholtz pointed out the similarity between the double layer of platinum electrodes and a capacitor, but it was a capacitor with leakage (Ann. Phys. 226:483–495).
Unravelling the electrochemical double layer by direct probing …
2016年8月31日 · The electrochemical double layer (EDL), originally conceived by Hermann von Helmholtz in the nineteenth century, constitutes a key concept in modern electrochemistry of electrified interfaces...