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Nanoceria hydrodynamic diameter, as surface area, before and after SBF exposure. (a) Nanoceria before citrate coating and SBF exposure. (b) Citrate-coated nanoceria before SBF exposure. Nanoceria after exposure to (c) SLF, (d) FaSSGF, (e) FeSSGF, (f) FaSSIF, and (g) FeSSIF. (2 columns. Not color)
