901842.fig.005a
(a)
901842.fig.005b
(b)
901842.fig.005c
(c)
Figure 5: SEM images of the products by adding PVP in the electrolyte at the different deposition times of 5 min (a), 10 min (b), and 20 min (c). The insets in Figures 5(a)5(c) show the magnification SEM images of the corresponding photos.