350425.fig.001a
(a)
350425.fig.001b
(b)
350425.fig.001c
(c)
350425.fig.001d
(d)
350425.fig.001e
(e)
350425.fig.001f
(f)
Figure 1: SEM images of one-dimensional ZnO grown at 700°C for 2 h on (a), (b) Sn, (c), (d) In, and (e), (f) Ni (a), (c), (e) sputter- or (b), (d), (f) spin coated silicon wafer substrates by thermal evaporation with a Zn mixture of Zn and ZnO in a weight ratio of 1.0 g : 1.0 g.