Figure 4.

a–c) SEM images of Ag₂O (a) octahedrons, (b) truncated octahedrons, and (c) cubes obtained through reducing the concentrations of starting materials. d) Schematic illustrating the corresponding synthetic mechanism. Reproduced with permission.35 Copyright 2010, American Chemical Society. e,f) SEM images of the (e) α‐Fe₂O₃ pseudocubes with {012} facets and (f) hexagonal bipyramidal α‐Fe₂O₃ with {113} facets prepared with and without solution stirring, respectively. Reproduced with permission.37 Copyright 2014, American Chemical Society. g,h) SEM images of ZnO columns (g) before and (h) after etching with OA. Reproduced with permission.40 Copyright 2010, American Chemical Society.