{"title":"Electrophoresis of Conducting and Nonconducting Microparticles in a Polar Electrolyte under a Strong Electric Field","authors":"E. A. Frants, A. A. Krylov, E. A. Demekhin","doi":"10.1134/S1061933X25600162","DOIUrl":null,"url":null,"abstract":"<p>This work is devoted to studying electrophoresis of conducting and nonconducting particles in a polar electrolyte solution under the action of a strong electric field. Numerical simulation results are presented for both types of particles, including distributions of cation and anion concentrations, charge densities, and total concentrations and fluxes of ions near the particle surface. It is shown that an extended spatial charge region arises near a dielectric surface at a sufficiently high surface charge. This region is formed due to a high surface conductivity in the electrical double layer and intense tangential ion fluxes. Qualitative differences are revealed between the the mechanisms of extended spatial charge formation for ion-selective and dielectric particles. The results obtained facilitate understanding the nonlinear electrokinetic processes and can be useful for designing microliquidic systems and colloidal technologies.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"87 4","pages":"593 - 605"},"PeriodicalIF":1.1000,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Colloid Journal","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S1061933X25600162","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
This work is devoted to studying electrophoresis of conducting and nonconducting particles in a polar electrolyte solution under the action of a strong electric field. Numerical simulation results are presented for both types of particles, including distributions of cation and anion concentrations, charge densities, and total concentrations and fluxes of ions near the particle surface. It is shown that an extended spatial charge region arises near a dielectric surface at a sufficiently high surface charge. This region is formed due to a high surface conductivity in the electrical double layer and intense tangential ion fluxes. Qualitative differences are revealed between the the mechanisms of extended spatial charge formation for ion-selective and dielectric particles. The results obtained facilitate understanding the nonlinear electrokinetic processes and can be useful for designing microliquidic systems and colloidal technologies.
期刊介绍：
Colloid Journal (Kolloidnyi Zhurnal) is the only journal in Russia that publishes the results of research in the area of chemical science dealing with the disperse state of matter and surface phenomena in disperse systems. The journal covers experimental and theoretical works on a great variety of colloid and surface phenomena: the structure and properties of interfaces; adsorption phenomena and structure of adsorption layers of surfactants; capillary phenomena; wetting films; wetting and spreading; and detergency. The formation of colloid systems, their molecular-kinetic and optical properties, surface forces, interaction of colloidal particles, stabilization, and criteria of stability loss of different disperse systems (lyosols and aerosols, suspensions, emulsions, foams, and micellar systems) are also topics of the journal. Colloid Journal also includes the phenomena of electro- and diffusiophoresis, electro- and thermoosmosis, and capillary and reverse osmosis, i.e., phenomena dealing with the existence of diffusion layers of molecules and ions in the vicinity of the interface.
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