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. 2023 May 3;14:2551. doi: 10.1038/s41467-023-38235-9

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — a UV-DRS spectrum, b EELS spectrum of Ni₃N nanosheets, c EELS plasmonic mapping of Ni₃N nanosheets for different electron energy losses, d Emission enhancement of the methylene blue (MB) (1.25 mM) in the presence of the Ni₃N nanosheets dispersion (0.5 mg mL⁻¹ Ni₃N in water) upon 630 nm excitation; e Photoluminescence of Ni₃N nanosheets dispersion upon 630 nm excitation.