ZnO hexagonal bilayer disk-like microstructures are successfully fabricated using a simple solvothermal method assisted with polyvinylpyrrolidone（PVP）. The structure and morphology were investigated by Xray diffract...ZnO hexagonal bilayer disk-like microstructures are successfully fabricated using a simple solvothermal method assisted with polyvinylpyrrolidone（PVP）. The structure and morphology were investigated by Xray diffraction（XRD）, scanning electron microscopy（SEM）, and energy-dispersive X-ray spectroscopy（EDX）. XRD result indicated that the as-obtained samples were well-crystallized wurtzite hexagonal ZnO structure. SEM images showed that the ZnO hexagonal bilayer disk-like assembles consist of two uniform and smooth disks with an average edge length of 6 μm and thickness of ～4 μm. UV-vis spectrum reveals that ZnO sampls show an appreciable red shift and the band gap energy of the obtained ZnO samples were about 3.15 eV. A very strong ultraviolet（UV） emission at the UV region was observed in the photoluminescence（PL） spectrum of the as-prepared ZnO samples tested at room temperature. A possible growth process of the ZnO hexagonal bilayer disk-like microstructures was schematically illustrated.展开更多
基金supported by the Shanghai Municipal Natural Science Foundation (Nos.17ZR1411000,14ZR1417100)the Key Subject of Shanghai Polytechnic University (No. 4:Material Science and Engineering, XXKZD1601)
文摘ZnO hexagonal bilayer disk-like microstructures are successfully fabricated using a simple solvothermal method assisted with polyvinylpyrrolidone（PVP）. The structure and morphology were investigated by Xray diffraction（XRD）, scanning electron microscopy（SEM）, and energy-dispersive X-ray spectroscopy（EDX）. XRD result indicated that the as-obtained samples were well-crystallized wurtzite hexagonal ZnO structure. SEM images showed that the ZnO hexagonal bilayer disk-like assembles consist of two uniform and smooth disks with an average edge length of 6 μm and thickness of ～4 μm. UV-vis spectrum reveals that ZnO sampls show an appreciable red shift and the band gap energy of the obtained ZnO samples were about 3.15 eV. A very strong ultraviolet（UV） emission at the UV region was observed in the photoluminescence（PL） spectrum of the as-prepared ZnO samples tested at room temperature. A possible growth process of the ZnO hexagonal bilayer disk-like microstructures was schematically illustrated.
