PROJECT TITLE :

Characteristics of controllable-shape well-aligned zinc oxide nanorods synthesised by microwave-assisted heating

ABSTRACT:

A microwave-assisted heating methodology for growing well-aligned zinc oxide (ZnO) nanorods on the ZnO/silicon (Si) substrate is developed. For ZnO nanorods growth, a skinny ZnO seed layer was deposited on an Si substrate by sputtering technique. The ZnO nanorods grown on the ZnO/Si substrate were synthesised in aqueous answer mixed with zinc nitrate hexahydrate and hexamethylenetetramine (HMTA) beneath microwave heating. The scanning electron microscopy (SEM) pictures and X-ray diffraction results exhibit that the ZnO nanorods with hexagonal section, single crystalline, and highly oriented along (002) plane are obtained successfully. SEM pictures also show that the morphology and diameter of the synthesised ZnO nanorods will be controlled by adjusting the molar ratio of Zn(NO3)2·6H2O to HMTA. The Raman scattering results evidence the vertical well-aligned ZnO nanrods with larger diameter are strain-free. The investigations of the photoluminescence spectra counsel that the ultraviolet emission peak of the synthesised ZnO nanorods depending on its controllable diameter would be applicable for numerous nanodevice fabrications.