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. 2021 Mar 3;11:5075. doi: 10.1038/s41598-021-84376-6

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© The Author(s) 2021

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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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(a) FTIR of a nanocomposite thin film (450 nm thickness, molar ratio Si/Ti : 6/1, CoFe₂O₄ MNPs : 0.4 vol%) and its modification upon DUV irradiation (carried out with LC8 lamp at 70 mW/cm²). (b) Widening of the 1680–1600 cm⁻¹ region to highlight the decrease of the C=C band (LC8 lamp at 70 mW/cm²). (c) Conversion of the C=C band plotted as a function of the irradiation time (line is for guiding eye).