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SEM images of the DGNs electrochemically deposited on a GR electrode at a constant −0.2 V potential for 200 s (A,A1) and 400 s (B,B1) from a 10 mM solution of HAuCl4 containing 0.1 M KNO3 (pictures (A1,B1) are magnified images of (A,B)) and EDS spectrum (C) of dendritic gold nanostructures presented in (A) SEM image.
