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. Author manuscript; available in PMC: 2015 Feb 11.
Published in final edited form as: Environ Sci Technol Lett. 2014 Feb 11;1(2):146–151. doi: 10.1021/ez400202b

Fig. 4. Precipitation of AuNPs in the roots (A) and leaves (B–E) of poplars exposed to 10 mg/L Au(III) ions on day 6.

Fig. 4

Scale bars of (A) 0.5 µm, (B) 2 µm, (C) 100 nm, (D) 0.2 µm, and (E) 50 nm.