126715.fig.004a
(a)
126715.fig.004b
(b)
126715.fig.004c
(c)
126715.fig.004d
(d)
Figure 4: Morphology evolution of Cu2O octahedron. (a) Octahedra, dealloyed in 0.05 mol/L HCl solutions for 14 h and (b) hexapods, dealloyed in 0.05 mol/L HCl solutions for 20 h. (c) and (d) dealloyed in 0.05 mol/L HCl solutions for 24 h: (c) dendrite and (d) octahedron-detached hexapods.