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. 2022 Sep 20;14(10):1988. doi: 10.3390/pharmaceutics14101988

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© 2022 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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The TEM images of (A) PDA nanoparticles, (B) PDA@Pt nanoparticles, (C) PDA@Pt-Fe₃O₄ nanoparticles. (D) The dynamic light scattering of PDA, PDA@Pt, and PDA@Pt-Fe₃O₄ nanoparticles, respectively. (E) The zeta potential of PDA, PDA@Pt, PDA@Pt-Fe₃O_4, and Nec-1/PDA@Pt-Fe₃O₄ nanoparticles, respectively. (F) FTIR spectra of the PDA@Pt-Fe₃O₄, Nec-1/PDA@Pt-Fe₃O₄, and free Nec-1. (G) XRD pattern of the PDA@Pt-Fe₃O₄. (H) UV-Vis-NIR spectra of the aqueous solutions of PDA, PDA@Pt, PDA@Pt-Fe₃O₄, Nec-1/PDA@Pt-Fe₃O_4, and free Nec-1. (I) Cumulative Nec-1 release of the Nec-1/PDA@Pt-Fe₃O₄ nanoparticles in PBS at pH 6.5 and 7.4.