“Boosting O₂^•− Photogeneration via Promoting Intersystem Crossing and Electron-Donating Efficiency of Aza-BODIPYBased Nanoplatforms for Hypoxic-Tumor Photodynamic Therapy”

Small Methods 2020, 4, 2000013. DOI: 10.1002/smtd.202000013 It has come to our attention that some errors have been found in Figure 4b, Figure 5d, and Figure S12 in our original article. For Figure 4b, the confocal fluorescence images of DHE-stained cancer cells were inadvertently misused during figure compilation. For the control group in Figure 5d, the microscopy image demonstrating Calcein-AM staining was misused. In Figure S12, the representative H&E-staining result of the heart in group iii (row 1, column 3) and group vi (row 1, column 6) was shown in error. The corrected images have been provided below. 4 Figure (Figure presented.) Cellular uptake and ROS generation. b) Intracellular photogeneration of O₂^•− incubated PPIAB NPs (upper), PPIAB NPs + Vitamin c (middle) and blank (bottom). 5 Figure (Figure presented.) d) Fluorescence imaging of live and dead 4T1 cells stained by calcein-AM and propidium iodide (PI) incubated with different NPs (20 µg mL⁻¹), scale bars: 200 µm. S12 Figure (Figure presented.) H&E staining results of normal organs, scale bars: 200 μm. This error has no further ramifications on the results or conclusions in the original manuscript. The authors sincerely apologize for any inconvenience caused by this correction.