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Figure 4: (a) TEM images and (b) HRTEM images of PCN-224(Fe)-900. (c) TEM images and (d) aberration-corrected HAADF-STEM image of PANI@PCN-224(Fe)-900. (e) HAADF-STEM image and corresponding Fe, C, and N elemental mappings of PANI@PCN-224(Fe)-900.