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NP characterization by TEM and EDX in human granular cell layer, cerebellum. (A) One spherical NP is enclosed by a red square. (B) EDX identifies Fe as the main element in the NP. (C,D) Typical crystal morphologies and fused surface textures of CFDNPs are co-associated with other reactive metals including Ti and Al. (E,F) A CFDNP particle displays Fe and Zn. Ni traces reflect the Ni TEM support grid.
