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STEM-EELS analysis of PEGylated aminosilica-coated ND4 nanoparticles. (A) Annular dark field STEM image with the 72*129 pixel spectrum image (SI) region indicated by the white rectangle. (B–E) STEM-EELS maps for (B) amorphous carbon, (C) diamond, (D) silicon, and (E) a color map showing diamond (red), silicon (blue), and amorphous carbon (green).
