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Elemental distribution of 12C14N, 35Cl, and 56Fe16O fragments originating from the porphyrin and oxidant and corresponding secondary electron image of the oCVD thin film prepared at a substrate temperature of 200 °C. The field of view is 40 × 40 μm2. Noticeably, the 35Cl hot spots match with the hot spots of the 56Fe16O fragments, which are both the exact negative of the 12C14N fragment.
