Библиографическое описание:Synthesis and Study of Superhigh-Concentrated Organosols of Silver Nanoparticles : научное издание / S. A. Vorobyev [et al.]. - Текст : непосредственный // Colloid Journal. - 2024. - Т.86, №2. - P. 208-217. - The work was carried out with the financial support of the basic project FWES-2021-0014 of the Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, and the Federal Program “Priority 2030” using the equipment of the Krasnoyarsk regional center for collective use of the Federal Research Center Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences. - ISSN 1061-933X. - ISSN 1608-3067, DOI 10.1134/S1061933X23601294.
Аннотация:Due to their unique properties, organosols of silver nanoparticles are widely used in optical and semiconductor devices, to produce electrically and thermally conductive films, as catalysts, antibacterial materials, etc. This work proposes a simple and highly productive method for the preparation of silver organosols, which have a metal concentration as high as 1800 g/L and contain spherical nanoparticles with low polydispersity and a median size of 9.1 nm. The method consists in the initial preparation of silver nanoparticle hydrosols with a concentration of higher than 30 g/L followed by the transfer of the NPs into an organic phase of <i>o</i>-xylene. A set of physical research methods has been employed to study the regularities of the extraction of silver nanoparticles with <i>o</i>-xylene in the presence of cetyltrimethylammonium bromide (CTAB) and ethanol and to determine the optimal process conditions, under which the extraction degree is as high as 62.5%. It has been found that bromine anions contained in CTAB molecules cause the aggregation of some amount of silver nanoparticles with the formation of silver metal sediment in the aqueous phase. According to X-ray photoelectron spectroscopy data, the sediment contains bromide ions (up to 4 at %) on the particle surface. Organosols synthesized under optimal conditions are stable for more than 7 months and withstand repeated cycles of drying and redispersing. Silver organosols have been used to obtain metal films with an electrical conductivity of about 68 500 S/cm, which increases to 412 000 and 509 500 S/cm (87.8% of the electrical conductivity of bulk silver) after thermal treatment at 150 and 250°C, respectively.
Издательство:Pleiades Publishing, Ltd. (Плеадес Паблишинг, Лтд), Москва
Источник:Colloid Journal
Выпуск:Т.86, №2
Номера страниц:208-217
Держатель оригинала документа:Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Siberian Federal University, Tomsk National Research State University
Количество экземпляров:
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