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. 2023 Apr 3;13:5441. doi: 10.1038/s41598-023-32330-z

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© The Author(s) 2023

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The optical properites of the NPs (a) Optical absorption of ZnO, (b) the band gap of ZnO, (c) Optical absorption of NiO, (d) the band gap of NiO, (e) th optical absorption of the prepared ZNO NPs, (b) Optical bandgap energy of ZNO NPs.