Figure 9.

a Schematic presentation of the evolvement process of anisotropic Co3O4 porous nanocapsules; b low-magnification SEM image showing that these nanocapsules are monodisperse with a uniform size; 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

Liu and Xue Nanoscale Research Letters 2010 5:1525-1534   doi:10.1007/s11671-010-9728-5