Fig. 1
Synthesis and characterization of Mn-ER-Cy. (a) Representative TEM image of MnCO3. (b) Representative high-resolution TEM image of MnCO3. (c) Representative TEM image of Mn-ER-Cy. (d) Elemental mapping analysis showing the distribution of carbon (C), nitrogen (N), oxygen (O), sulfur (S), chlorine (Cl), bromine (Br), and manganese (Mn) in Mn-ER-Cy. (e) UV-vis-NIR absorption spectrum of MnCO3, ER-Cy, and Mn-ER-Cy in phosphate-buffered saline (PBS). (f-h) FTIR spectrum, XRD pattern, and XPS spectrum of Mn-ER-Cy. (i) TEM observation of Mn-ER-Cy degradation following exposure to acidic conditions or laser irradiation. Scale bar = 1 μm