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. 2013 Oct 11;18(10):12609–12620. doi: 10.3390/molecules181012609

Figure 1.

Figure 1

TEM images of Au NPs synthesized by mixing 0.06 mmol HAuCl4 with different amounts of NaBH4. (a) 0.4 mmol; (b) 0.5 mmol; (c) 1.0 mmol; and (d) 1.1 mmol NaBH4. Scale bars are 20 nm.