Role of seed layer: lattice orientation attachment and structural stabilization on the lateral growth of ZnO nanorods

摘要

The role of seed layer (SL) on the growth of ZnO nanorods was investigated by preparing SL with different concentrations of zinc acetate by jet nebulizer spray pyrolysis technique at different deposition time. The ZnO nanorods were grown on the ZnO seeded substrate by hydrothermal method. The influence of SL on the growth of ZnO nanorods with respect to SL concentration and deposition time were studied with various characterization tools. The results had shown that the orientation of crystallites and alignment of rods were found to be improved with lower concentration and increasing deposition time of SL and the converse effect was found in the higher concentration. The various morphologies were obtained on the surface of SL with respect to different concentration and deposition time and they were discussed in detail from the basic nucleation theories. The growth mechanism of ZnO nanorods on the SL is effectively investigated. The lateral growth was found in nanorods, due to lattice orientation effect. The hexagonal structural stabilization was also observed and discussed in detail. The Raman measurements confirm the wurtzite phase, high crystal quality and quantum confinement in ZnO nanorods.