Anisotropic Growth of Porous Anodic Alumina and Its Potential Application in Three-Dimensional Nanostructure Construction
Figure 2
Schematic illustrations of the typical growth process of the nano tubes on smooth surface (a) and rough surface (b), respectively. The diameter of the nano tube was kept to be constant in Figure 2(a) but tends to be larger due to the presence of the micro scale cavity in Figure 2(b).
