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TEM images (stained with 2 wt% uranyl acetate) of (A) S-FE, (B) C-FE, (C) C-GE, (D) FBA-FE, and (E) FE. Images with higher magnifications can be seen in Figure S6. (F) Schematic illustration of the proposed self-assembled structures of S-FE and C-FE.
