Keywords: ZnO nanorods, zinc oxide, high-resolution transmission electron microscopy, HRTEM, UV-visible spectroscopy, Fourier transform infra red, FTIR, optical properties, nanomaterials, nanotechnology, synthesised ZnO, ZnO nanostructures
Synthesis and characterisation of ZnO structures containing the nanoscale regime
Synthesis of ZnO nanorods assembled in flower-shaped spherical morphologies have been grown via solution process by using zinc nitrate hexahydrate (Zn(NO3)2. 6H2O) and sodium hydroxide (NaOH) at low-temperature of 100°C in eight hours. The grown ZnO structures were characterised in terms of their structural and optical properties. The detailed structural characterisations demonstrated that the synthesised products are single crystalline with the wurtzite hexagonal phase and grown along the , c-axis direction. A strong absorption band at 480 cm−1 was observed in Fourier transform infra red (FTIR) spectrum which was related with the ZnO. The optical property of the grown ZnO structures was observed by using UV-visible studies. Only a sharp peak at 371 nm was observed in the UV-vis. spectrum which is a characteristic band for the wurtzite hexagonal pure ZnO. Moreover, systematic time-dependent reactions were also performed to know the detailed growth process for the synthesised ZnO nanostructures.