{"title":"Temperature-Regulated Surface Properties of Membranes Based on Concentrated Silver Sol Stabilized by AOT in n-Decane","authors":"A. N. Kolodin","doi":"10.1134/S1061933X2560112X","DOIUrl":null,"url":null,"abstract":"<p>The surface properties of silver membranes (metal content as high as 97 wt %) have been comprehensively analyzed. The membranes have been obtained via the self-assembly from an electrophoretic nanoparticle concentrate (~1.7 M) followed by sintering at 250–500°C. Increasing the sintering temperature makes it possible to modify the surface properties of the resulting membranes. The root-mean-square roughnesses of the front and back sides increase (from 47 to 104 nm and from 119 to 152 nm, respectively), while the porosities decrease (from 52.7 to 28.4% and from 46.1 to 19.9%, respectively). Due to the silver base and the developed porous structure, the samples are characterized by a low mechanical stiffness (~481 kPa) and can be further modified by force lithography. Regardless of the sintering temperature, the membranes exhibit asymmetric wettability. The water contact angle difference between the two sides is as large as 52°.</p>","PeriodicalId":521,"journal":{"name":"Colloid Journal","volume":"88 2","pages":"132 - 146"},"PeriodicalIF":1.1000,"publicationDate":"2026-03-18","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/S1061933X2560112X","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
The surface properties of silver membranes (metal content as high as 97 wt %) have been comprehensively analyzed. The membranes have been obtained via the self-assembly from an electrophoretic nanoparticle concentrate (~1.7 M) followed by sintering at 250–500°C. Increasing the sintering temperature makes it possible to modify the surface properties of the resulting membranes. The root-mean-square roughnesses of the front and back sides increase (from 47 to 104 nm and from 119 to 152 nm, respectively), while the porosities decrease (from 52.7 to 28.4% and from 46.1 to 19.9%, respectively). Due to the silver base and the developed porous structure, the samples are characterized by a low mechanical stiffness (~481 kPa) and can be further modified by force lithography. Regardless of the sintering temperature, the membranes exhibit asymmetric wettability. The water contact angle difference between the two sides is as large as 52°.
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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