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. 2021 Jan 11;12:229. doi: 10.1038/s41467-020-20512-6

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© The Author(s) 2021

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Fig. 5 — Schematic illustration of CaF₂ NC formation with different ligands; (a) AEP and (b) Citrate. The NCs’ size (in pink), concentration (in turquoise) and F^- ion concentration in solution (in blue). HR-TEM images of AEP-CaF₂ NCs presenting twinning defects (inset, in a) and of Cit-CaF₂ NCs presenting a crystalline morphology (inset, in b).