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. 2023 Dec 11;15(24):4662. doi: 10.3390/polym15244662

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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TEM micrographs of the samples: (a) MNP-Fe₃O₄; (b) 18% MNP-Fe₃O₄/PLA; and (c) 33% MNP-Fe₃O₄/PLA, and their corresponding particle size distribution histograms (a′–c′).