Abstract—
NiO nanoparticles have been synthesized in a low-pressure arc discharge plasma at a gas mixture pressure in the chamber of 70 Pa, using argon as a plasma gas. The nanoparticles were deposited on a substrate at temperatures of 300, 400, 500, and 600 K. The deposition time was 30 min. X-ray diffraction characterization showed that the synthesized NiO nanoparticles were polycrystalline at all of the deposition temperatures. The nanoparticles ranged in size from 3.2 to 32.7 nm. We have studied the optical properties of the synthesized nanoparticles. The results demonstrate that their band gap decreases linearly with increasing nanoparticle size, ranging from 2.91 to 1.93 eV.
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Funding
The work was performed with the support of the grant of the Russian Science Foundation (project No 20-19-00021).
The electron microscopy investigations were conducted in the SFU Joint Scientific Center supported by the State assignment (#FSRZ-2020-0011) of the Ministry of Science and Higher Education of the Russian Federation.
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Karpov, I.V., Ushakov, A.V., Fedorov, L.Y. et al. A Study of Vacuum Arc Deposition Parameters and Their Effect on the Structural and Optical Properties of NiO Nanoparticles. Inorg Mater 58, 792–798 (2022). https://doi.org/10.1134/S0020168522080039
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DOI: https://doi.org/10.1134/S0020168522080039