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Organic Films Synthesized on an Iron Surface in Low-Temperature Plasma of Adamantane

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Abstract

In this paper, thin polymer films obtained on iron substrates in low-temperature plasma of adamantane vapor were studied by scanning electron microscopy, atomic force microscopy, ESCA, contact angle measurements, and nanoindentation. It is shown that the films have a thickness about 1–2 μm and a columnar structure (the diameter of the “columns” is 50–100 nm). The surface energy of the films is close to the energy of low-polar organic polymers. The composition of the thin surface layer includes carbon (partially as peroxide groups), oxygen (as peroxide groups only), and a small amount of nitrogen (as amino groups). The reason for the appearance of such a significant concentration of oxygen is the secondary reaction of the film free radicals with atmospheric oxygen. The thickness, morphology, chemical composition, surface energy, and some physicomechanical properties, such as the hardness, reduced modulus of elasticity, elastic recovery parameter, compliance, elastic deformation work, and plastic deformation work of the films, are determined. It is also shown that the properties of the obtained films are close to the properties of low- and high-pressure polyethylene samples.

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ACKNOWLEDGMENTS

Studies were performed using the equipment of the Core Shared Research Facilities “Center of Physical and Physicochemical Methods of Analysis, Investigations of Properties and Characteristics of Surface, Nanostructures, Materials, and Samples” of the Udmurt Federal Research Center, Ural Branch, Russian Academy of Sciences. The authors are grateful to V.F. Gilmutdinov, Ph.D., for participation in the creation and commissioning of a plant for the production of plasma polymerized films.

Funding

This research was carried out with the support of the Ministry of Science and Higher Education of the Russian Federation, projects nos. 121030100003-7 and 0427-2019-0029.

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Correspondence to A. A. Shakov.

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Translated by M. Drozdova

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Shakov, A.A., Lomayeva, S.F., Pozdeev, V.A. et al. Organic Films Synthesized on an Iron Surface in Low-Temperature Plasma of Adamantane. Tech. Phys. 67, 718–724 (2022). https://doi.org/10.1134/S1063784222100073

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