745746.fig.004a
(a)
745746.fig.004b
(b)
745746.fig.004c
(c)
Figure 4: (a)~(c) The TEM image of Fe3O4 nanowires formed at high temperature, 110°C, and under various NaOH concentrations, (a) 5 m, (b) 15 m, and (c) 20 m.