Structural characterization of ZnO/ZnS core-shell nanostructures deposited at atmospheric pressure using DEZn, N2O and DTBS

• Main Authors: Sheng-Wen Wen, 溫盛文
• Other Authors: Jyh-Rong Gong
• Format: Others
• Language: en_US
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/54299067500361361583

碩士 === 國立中興大學 === 物理學系所 === 104 === In this thesis, ZnO nanowires and radial ZnO/ZnS core-shell nanostructure arrays were deposited at atmospheric pressure in a temperature range of 300 ~ 600 oC with diethylzinc (DEZn), nitrous oxide (N2O) and ditert-butylsulfide (DTBS) precursors serving as sources of Zn, O and S elements in the ZnO nanowires and radial ZnO/ZnS core-shell nanostructures. The physical properties of radial ZnO/ZnS core-shell nanostructures were characterized using θ-2θX-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and photoluminescence spectroscopy (PL). It was found that both ZnO and ZnS were wurtzite structure in nature based upon HRTEM investigations. Moire fringes were identified in the radial ZnO/ZnS core-shell nanostructure with a good agreement in the lattice mismatch between ZnO and ZnS in the pseudomorphic ZnO/ZnS core-shell nanostructure. Finally, a slight red-shift in the near band edge (NBE) emissions of the RT PL of the ZnO/ZnS core-shell nanostructures was observed.