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. 2023 Jun 26;21:201. doi: 10.1186/s12951-023-01955-7

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© The Author(s) 2023

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/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 1 — Fabrication and characterization of various forms of MBRs: Fe₃O₄/GOx/MgCO₃@PLGA gels. SEM images and corresponding mapping images of MBRs without (A) and with (B) AMF exposure. (C) Energy spectrum of MBRs (insert figure showing weight% analysis of elements). (D) WCA test results of different groups (insert: optical images). (E) Digital images of the injectable MBRs through a standard 1 ml syringe and representative images of different forms. (F) Magnetic hysteresis loop of MBRs and Fe₃O₄ nanoparticles. (G) FTIR spectra of PLGA, MgCO₃, GOx, Fe₃O₄ and MBRs. (H) XRD spectra of PLGA, MgCO₃, GOx, Fe₃O₄ and MBRs. (I) XPS spectra of MBRs. (J) Fe 2p XPS of MBRs. (K) TGA curves of PLGA, GOx-PLGA, Fe₃O₄/MgCO₃@PLGA and MBRs.