Optical properties of metal oxide nanoparticles: UV-Vis study of CuO and MnO2 NPs.

Propiedades ópticas de nanopartículas de óxidos metálicos: Estudio de NP de CuO y mediante MnO2 UV-Vis

Published 2024-07-01

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Vol. 21 No. 42 (2024): Estructura cristalina del superconductor
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Optical properties of metal oxide nanoparticles: UV-Vis study of CuO and MnO2 NPs. (2024). Revista EIA, 21(42), 4202 pp. 1-11. https://doi.org/10.24050/reia.v21i42.1773
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https://doi.org/10.24050/reia.v21i42.1773
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Brandon Suarez Jimenez
Universidad Tecnológica de Pereira, Colombia
Dorian Camilo Londoño Zuluaga
Universidad Tecnologica de Pereira, Colombia
Henry Riascos Landazuri
Universidad Tecnologica de Pereira
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In recent years, interest has been found by the scientific community in studying nanoparticles (NPs) and exploring the vast diversity of applications they have, even as an alternative to materials used conventionally. A key step in the study of nanoparticles is the analysis of their optical properties, since these reveal information on their stability, purity, and interactions with UV-vis radiation, and help to confirm the identity of the nature of the nanoparticles. In this project, samples of copper and manganese oxide nanoparticles were synthesized and studied, with the aim of understanding key points in the behaviour of these. Observed peaks on UV-Vis spectra allowed to confirm the identity of the nanoparticles produced, with results showing high stability for CuO NPs synthesized in water and methanol; MnO2 NPs were found to be unstable in water, due to nanoparticle agglomeration. The analysis of surface plasmon resonance peaks showed the presence of oxidation reactions during the ablation process. Estimated band gap values were 5,44 and 3,77 eV, for CuO and MnO2 nanoparticles respectively, which rules out any possible application of these NPs as semiconductor materials. CuO nanoparticles have a potential application as an antibacterial material, due to its high stability in water and copper’s natural cytotoxicity.

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