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. 2021 Jun 30;8(4):rbab020. doi: 10.1093/rb/rbab020

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© The Author(s) 2021. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 1. — Characterization of nanoparticles. (a) TEM images and size distribution (insets) of MSNs and MSNs-PAA (scale bar: 100 nm). (b) Zeta potential, (c) FT-IR spectra, and (d) XRD spectra of MSNs and MSNs-PAA. (e) Drug loading capacity and encapsulation efficiency of MSNs-PAA. (f) Cumulative drug release curve of AG@MSNs-PAA at pH 5.6 or 7.4 in vitro. Data were shown as mean ± SD (n = 3).