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. 2022 Nov 14;13:6910. doi: 10.1038/s41467-022-34718-3

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© The Author(s) 2022

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

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Fig. 3 — Results of MIL-101 nanoparticle (NP) degradation analysis after 24-h incubation in PBS and water at the concentration 200 mg L⁻¹ are marked with red and blue, respectively (columns and lines). a Histograms of the particle size distribution based on scanning electron microscopy analysis (n = 1 experiment, 500 particles were analysed for each histogram). b Electron micrographs obtained using in-beam secondary electron (SE) mode (top row) and in-beam back-scattered electron (BSE) mode (bottom row) of MIL-101 NPs incubated in water (left) or PBS (right), n = 1 experiment. Scale bars = 200 nm. c The ζ-potential distributions of nanoparticles, n = 1 experiment, 3 repetitions. d Iron concentration in the dry and supernatant fractions from the MIL-101 NPs incubated in water or PBS, n = 3 samples. Data are presented as mean values ± SD. e Fluorescence spectra of 2-aminoterephtalic acid released from MIL-101 NPs into the supernatant. Excitation—315/10 nm. n = 1 measurement. f Brunauer–Emmett–Teller N₂ adsorption/desorption isotherms of MIL-101 NPs. n = 1 measurement. g X-ray diffraction patterns of MIL-101 NPs. n = 1 measurement. h Energy-dispersive spectroscopy patterns of MIL-101 NPs. n = 1 measurement.