摘要
采用低温蒸发和气相输运方法，研制出ZnO的纳米棒－纳米钉、纳米钉类球状聚集体和具有钉状结构的纳米梳。利用透射电子显微镜和X射线衍射仪对其形貌与结构进行了表征，阐明了ZnO纳米结构的生长机理。用荧光光谱仪测量了退火前后纳米棒－纳米钉结构的光致发光谱，结果显示，在380nm处两者均存在近紫外峰，在500nm处出现绿色宽谱峰，而退火2h后近紫外发光峰窄而强，且发生了少许蓝移，此现象可归因于退火后的ZnO纳米结构具有较低的点缺陷浓度。
By optimizing preparation parameters, nanorod-nanonail, nanonail- conglobulation and nanocomb of ZnO materials were fabricated through low-temperature evaporation and vapor transport method. Their morphology and microstructure were investigated by transmission electron microscope （TEM） and X-ray diffractometer （XRD）, and their growth mechanisms were elucidated thoroughly. Furthermore, the photoluminescenee spectrum of ZnO nanorod-nanonail was investigated by fluorescence spectrometer. Before and after the spectra of nanorod-nanonail annealing revealed a green emission band centered at about 50Onto and a near UV emission band centered at about 380hm. Especially, the spectrum of the annealed material showed that the near UV emission band become narrower and stronger, and has a little blue shift comparing to the material without annealing. This phenomenon is due to the fewer defects in the annealed ZnO nanorod-nanonail.
基金
973计划前期研究专项（No.2006CB708310）
湖北省人才基金（No.2007ABB008）
华中科技大学基金资助项目（No.20062007B）的资助
