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. 2021 May 25;11(15):7439–7449. doi: 10.7150/thno.62437

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(A) TEM image of Mn-ZGGOs. (B) Elemental mapping images of Mn-ZGGOs. (C) X-ray excited optical luminescence (XEOL) and X-ray excited persistent luminescence (XEPL) spectra of Mn-ZGGOs. (D) XEPL decay images of the Mn-ZGGOs with GSH or without GSH. (E) XPS of Mn 2p for Mn-ZGGOs. (f) Fluorescence spectra of [Ru(dpp)₃]Cl₂ of Mn-ZGGOs with or without H₂O₂. (G) The r₁ value of Mn-ZGGOs with or without 1 mM GSH in 9.4 T MR instrument. (H) UV/Vis absorption spectra and photo (inset) of MB after degradation by H₂O₂ plus GSH-treated Mn-ZGGOs ([HCO₃^-] = 25 mM, [Mn] = 0.5 mM, [H₂O₂] = 10 mM). (I) Fluorescence spectra of SOSG (5 μM) incubated with Mn-ZGGOs for 20 min in H₂O or different PBS buffer (pH = 7.4, 6.5, 5.6).