Figure 4. SEM images of the resulting nanoparticles (A and B) as well as the surface of a silver wire before (C) and after the electrochemical treatment (D)

From

Electrochemical Synthesis of Coin Metal Nanoparticles in School Chemistry Education

Elena von Hoff, Stefanie Waitz, Felix Kollenda, Thomas Waitz

World Journal of Chemical Education. 2018, 6(1), 72-77 doi:10.12691/wjce-6-1-11