Morphology evolution of hydrothermally grown ZnO nanostructures on gallium doping and their defect structures

► Ga doped ZnO nanostructures were successfully grown by hydrothermal chemical route. ► Ga doping has strong effect on the resulting morphology of ZnO nanostructures. ► Anomalous vibrational modes in wurtzite ZnO lattice are induced by Ga doping. ► Incorporated Ga atoms accommodate at preferential lattice sites.