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. Author manuscript; available in PMC: 2016 Feb 27.
Published in final edited form as: Nanotechnology. 2015 Feb 4;26(8):085602. doi: 10.1088/0957-4484/26/8/085602

Figure 5.

Figure 5

Scanning electron microscopy images comparing un-annealed and annealed nanoporous gold. a) Initial NPG structure as prepared, b) NPG annealed in 0.1 M NaNO3 for 50 oxidation-reduction cycles c) NPG annealed in 0.1 M NaClO4 for 50 oxidation-reduction cycles d) NPG annealed in 0.1 M KCl for 30 oxidation-reduction cycles. The lower panel shows the surface area reduction upon annealing in the different electrolyte solutions using electrochemical cycling. The value of A0 is 21 ± 2 cm2. The error bars represent the standard deviations for 3 repeat experiments in each case. The scale bar in each frame (a–d) is 200 nm.