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. 2017 Jul 19;12(7):e0181634. doi: 10.1371/journal.pone.0181634

Fig 1. Scanning electron microscopy (SEM) images of ZnO NPs.

Fig 1

(A) Pristine 20 nm, (B) Citrate 20 nm, (C) L-serine 20 nm, (D) Pristine 100 nm, (E) Citrate 100 nm, and (F) L-serine 100 nm.