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. 2014 Jun 5;9(6):e99175. doi: 10.1371/journal.pone.0099175

Figure 2. Transmission electron microscopy (TEM) images of Au-NPs trapped inside the cells.

Figure 2

TEM images at 200-nm magnification showing the internalization of 25 µg/mL Au-NPs with various sizes (5 nm, 10 nm, 20 nm, and 40 nm) into (A) A549 and (B) 95D cells after 48 h of treatment.