The Brownian dynamics method is employed to study the formation of an electrical double layer (EDL) on the metal nanoparticle (NP) surface in hydrosols during adsorption of electrolyte ions from the interparticle medium. Also studied is the charge accumulation by NPs in the Stern layer. To simulate the process of the formation of EDL, we took into account the effect of image forces and specific adsorption, dissipative and random forces, and the degree of hydration of adsorbed ions on the EDL structure. The employed model makes it possible to determine the charge of NPs and the structure of EDL. For the first time, the charge of both the diffuse part of EDL and the dense Stern layer has been determined. A decrease in the electrolyte concentration (below c < 0.1 mol/l) has been found to result in dramatic changes in the formation of the Stern layer. Graphical abstract

中文翻译：

---

在金属水溶胶中形成纳米粒子双电层的物理原理

布朗动力学方法用于研究在从粒子间介质中吸附电解质离子期间，水溶胶中金属纳米粒子 (NP) 表面上双电层 (EDL) 的形成。还研究了 NP 在 Stern 层中的电荷积累。为了模拟 EDL 的形成过程，我们考虑了图像力和比吸附、耗散力和随机力以及吸附离子对 EDL 结构的水合程度的影响。采用的模型可以确定 NPs 的电荷和 EDL 的结构。首次确定了 EDL 扩散部分和致密 Stern 层的电荷。电解质浓度降低（低于 c < 0。已发现 1 mol/l) 会导致 Stern 层的形成发生巨大变化。图形概要