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. 2020 Apr 20;15:2583–2603. doi: 10.2147/IJN.S231062

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© 2020 Eshaghi Malekshah et al.

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FTIR spectra of (a) bare Fe₃O₄ MNPs; (b) Fe₃O₄/SiO₂; (c) Fe₃O₄ MNPs treated by APTES; (d) Fe₃O₄ MNPs coated by Schiff base; (e) Fe₃O₄/SiO₂/APTS~Schiff base-Cu(II).