Thus rods obtained at higher pH are shorter with lowest aspect ratio and aggregated.
At lower alkalinity of the solution say pH of 11 and 9, well separated hexagonal nano rods along with few tetrapod and flower-like morphology were exhibited by as-synthesized products A2 and A3, respectively [25].
The formation of tetrapod and flower-like morphology could be attributed to the formation of some of the activated ZnO nuclei that differ in their size