Electrochemical Deposition and Formation Mechanism of Single-Crystalline Cu₂O Octahedra on Aluminum

Figure 4

SEM images of the as-deposited specimen at different bath pH: (a) pH = 8; (b) pH = 9; (c) pH = 11; (d) pH = 12 at −0.3 V for 30 min.

(a)

(b)

(c)

(d)