ZnO四足和多足纳米结构的制备和光致发光性能研究

采用简单的热蒸发法,在没有使用载气和催化剂的情况下成功制备出ZnO四足和多足纳米结构。采用场发射扫描电镜、X射线衍射、高分辨透射电子显微镜和荧光分光光度计研究了ZnO纳米结构的形貌、结构和光致发光性能。结果表明所合成的ZnO是由具有六方纤锌矿结构的四足和多足纳米结构组成,足部呈棒状并沿0001]方向生长。提出了四足和多足ZnO纳米结构的生长机制。在室温下的光致发光光谱中,494nm处出现一个较强的绿色发射峰,391nm处出现一个较弱的紫外发射峰。

Fabrication and Photoluminescence Property of ZnO Tetrapod and Multipod Nanostructures

ZnO tetrapod and multipod nanostructures were successfully synthesized without the presence of carrier gas and ca-talyst through a simple thermal evaporation method. The morphology, structure and photoluminescence properties of ZnO nanostructures were characterized by field-emission scanning electron microscopy, X-ray diffraction, transmission electron microscopy and fluorescence spectroscopy. The results demonstrated that the as-synthesized ZnO consisted of tetrapod and multipod nanostructures with a hexagonal wurtzite structure. The legs of the nanostructures had rod-like shape and grew preferably in the 0001] direction. The growth mechanisms of the ZnO tetrapod and multipod nanostructures were proposed. Room temperature photoluminescence (PL) spectra showed that the as-synthesized ZnO nanostructures had a strong green emission centered at 494 nm and a weak ultraviolet emission at 391 nm.