Figure 12.

Anisotropic porous Co₃O₄ nanocapsules and their evolution process. (a) Schematic presentation of the evolution process of anisotropic Co₃O₄ porous nanocapsules. (b) Low-magnification SEM image showing that these nanocapsules are nearly monodisperse. (c) Low-magnification TEM image showing the porous shell of anisotropic Co₃O₄ nanocapsules. (d) High-magnification TEM image exhibiting a single, porous Co₃O₄ nanocapsule. (e) HRTEM image of individual nanocrystals revealing the (111) lattice plane. Adapted from [64] and reproduced with the permission of the Royal Society of Chemistry.