Two-layer electromagnetic shielding sandwich structures based on irregular micromeshes

Voronin A.S., Damaratskiy I.A., Makeev M.O., Ryzhenko D.S., Mikhalev P.А., Aleksandrovsky A.S., Fadeev Y.V., Ivanchenko F.S., Khartov S.V.

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For Russian citation (Opticheskii Zhurnal):

Воронин А.С., Дамарацкий И.А., Макеев М.О., Рыженко Д.С., Михалёв П.А., Александровский А.С., Фадеев Ю.В., Иванченко Ф.С., Хартов С.В. Двухслойные радиоэкранирующие сэндвич-структуры на основе нерегулярных микросеток // Оптический журнал. 2025. Т. 92. № 2. С. 25–40. http:// doi.org/10.17586/1023-5086-2025-92-02-25-40

Voronin A.S., Damaratskiy I.A., Makeev M.O., Ryzhenko D.S., Mikhalev P.A., Aleksandrovskiy A.S., Fadeev Yu.V., Ivanchenko F.S., Khartov S.V. Two-layer EMI shielding sandwich structures based on irregular micromeshes [in Russian] // Opticheskii Zhurnal. 2025. Т. 92. № 2. P. 25–40. http://doi.org/10.17586/1023-5086-2025-92-02-25-40

For citation (Journal of Optical Technology):

Abstract:

Research subject. In this work, we investigated the spectral properties of irregular silver micromeshes and sandwich structures based on them in the visible and radio frequency ranges. Irregular silver micromeshes were formed using a self-organized template obtained by cracking a thin film of egg white. Aim of study. Development of a method for producing irregular silver micromeshes, more than 500 nm thick, with low surface resistance and high transmission in the visible range. Production of sandwich structures based on irregular silver micromeshes, demonstrating a shielding factor in the radio frequency range of at least 60 dB. Results. We have developed a method for local peeling off the perimeter of self-organized template cells, which allows us to significantly increase the thickness of the deposited silver to values exceeding 500 nm. Increasing the thickness of the deposited metal is a critical factor for improving the optoelectric characteristics of irregular silver micromeshes. Two-layer sandwich structures are formed based on the obtained micromeshes. Sandwich structures consisting of irregular silver micromeshes based on a template with a partially peeled off perimeter of cells demonstrate a shielding coefficient of 71.01 dB in the range of 1–7 GHz with a transmittance in the visible range of 80.02%. Practical significance. Sandwich structures based on irregular silver micromeshes based on a template with a partially peeled cell perimeter are promising for shielding optically transparent objects and information output devices. The sandwich structures obtained in the work surpass the optically transparent radio emission screens used in practice, according to the set of parameters of the shielding coefficient — optical transmission — production cost.

Keywords:

self-assembled template, egg white, partial detachment of cell perimeter, irregular microgrid, radio-shielding sandwich structure

Acknowledgements:

the fabrication of silver irregular microgrids and sandwich structures based on them, as well as the study of their optoelectric and shielding properties, was carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation within the framework of State Assignment No. FSFN-2024–0016. The production and study of the self-organized template, as well as the operation of partial detachment of the cell perimeter, were carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation within the framework of State Assignment No. FWES-2024-0026. The studies using the scanning electron microscopy method were carried out on the equipment of the Krasnoyarsk Regional Center for Collective Use of the Federal Research Center KSC SB RAS.

OCIS codes: 160.0160, 160.3900, 160.4670

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