Mr. Stanislav Osipov Profile

Stanislav Osipov

at TU Wien

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Proceedings Article | 25 July 2022 Paper

Formation of zinc oxide nanoobjects arrays for electrically switchable diffraction gratings

Serguei Murzin, Nikolay Kazanskiy, Stanislav Osipov

Proceedings Volume 12295, 122950F (2022) https://doi.org/10.1117/12.2631728

KEYWORDS: Zinc oxide, Nanowires, Diffusion, Laser irradiation, Diffraction gratings

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The specific characteristics and regularities of the formation of nanostructured arrays of ZnO nanowires on a conductive copper-zinc alloy substrate were determined. Pulsed-periodic CO₂ laser irradiation led to the vibration of the treated samples, which was only a condition for the intensification of nanowires growth during laser heating. The laser irradiation resulted in an increase in temperature in the central region and during this process the arrays of ZnO nanobjects were formed with greater intensity in the central part of the sample than at the periphery. Surface dezincification and a selective oxidation process may represent a new approach in the production of nanomaterials with customizable and controllable electrical and optical properties. In this case, a layer of copper oxide (I) is formed on the surface of the material from which zinc oxide nanowires are emerging. High air humidity, in which an additional hydratogenic layer is formed on the surface of the brass, also contributes to a change in the mechanism of oxide structures formation. Measurements of electrical resistance of the created samples was established that the specific electrical resistance was by 30–40 % greater in the central area of the sample than at the periphery, and it reached 700 Ω × cm. The oxygen adsorbed in the sample increased the electrical resistivity by 70 % up to the value of 1200 Ω × cm. Such arrays can be used to create a periodic localized electric field when a direct current is applied. In turn, this provides the opportunity to produce electrically switchable diffraction gratings with a varying character of zones.

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