126715.fig.003a
(a)
126715.fig.003b
(b)
126715.fig.003c
(c)
126715.fig.003d
(d)
126715.fig.003e
(e)
126715.fig.003f
(f)
126715.fig.003g
(g)
126715.fig.003h
(h)
Figure 3: Cu2O crystals with various morphologies: (a–d) SEM images. (a) Cube, dealloyed in 0.5 M HF for 4 min, (b) cuboctahedron, dealloyed in 0.05 M HCl for 6 h, (c) truncated octahedron, dealloyed in 0.05 M HCl for 8 h, (d) octahedron, dealloyed in 0.05 M HCl for 14 h. (e–h) are their corresponding three-dimensional models.