PROJECT TITLE :

Morphology control and characteristics of ZnO/ZnS nanorod arrays synthesised by microwave-assisted heating

ABSTRACT:

The morphology control investigations on ZnO/ZnS core/shell nanorod fabricated by microwave-assisted in-situ surface sulphidation of ZnO nanorod arrays is presented. Initial, the ZnO nanorod arrays are grown on ZnO/Si substrate by microwave heating of a mixed zinc nitrate hexahydrate and hexamethylenetetramine precursors in deionised water. Then, the grown ZnO nanorod arrays on ZnO/Si substrate are immersed in thioacetamide (TAA) aqueous resolution to bear sulphidation method to create ZnS shell on ZnO core. The morphological, structural, and optical characteristics of the as-ready ZnO nanorods and ZnO/ZnS core/shell nanorods are investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), and photoluminescence (PL) measurements, respectively. The SEM pictures and XRD patterns show that the ZnS shell becomes thicker because of more and a lot of ZnS nanoparticles shaped with increasing the concentration of TAA resolution. The PL spectra demonstrate that the thicker ZnS shell results in additional oxygen vacancies occupied by S atom, and would decrease the intensity ratio of the deep-level emission to the ultra-violet emission for the ZnO/ZnS core/shell nanorods synthesised with the higher concentration of TAA solution.