A study on morphology control and optical properties of ZnO nanorods synthesized by microwave heating

► Morphology of ZnO nanorods can be controlled via microwave-heating synthesis. ► Molar ratio of Zn(NO3)2·6H2O to C6H12N4 affects the aspect ratio of ZnO nanorod. ► ZnO nanorod showing higher aspect ratio can exhibit better optical properties.