摘要
采用水热法在氧化锌晶种修饰的衬底上生长氧化锌纳米棒,利用扫描电子显微镜(SEM)和X射线衍射仪(XRD)系统地分析了晶种分布状态对氧化锌纳米棒排列的影响.SEM结果表明随着晶种密度的增大,氧化锌纳米棒从排列无序向具有高度取向的紧密有序纳米棒阵列转变,反映纳米棒端面垂直生长优化;XRD表征显示,随着晶种密度的增大,(002)峰增强,(110)峰减弱,即端面衍射增强,侧面衍射减弱,与SEM结果相对应.同时在生长的氧化锌纳米棒中存在链状和花状的簇结构,分析表明这些簇结构与晶种在衬底上的特殊分布状态有关.
Using low temperature hydrothermal approach, ZnO nanorods are obtained on substrate coated with thin film of ZnO crystal seeds. Scanning electron microscopy （SEM） and X-ray diffraction spectroscopy （XRD） are employed to study the influence of crystal seeds density on the morphology of ZnO nanorods and cluster structure. SEM images show that when the density of the crystal seeds increases, ZnO nanorods array become well-aligned. The XRD patterns reveal that when the density of the crystal seeds increases, the intensity of （002） peak increases and that of （110） peak decreases, which means the orientation of ZnO nanorods has changed. The flower-like clusters and chain clusters of ZnO nanorods are fabricated. Further studies show that these clusters are related to the distribution of the crystal seeds on the substrate, witch is affected by the substrate structure.
出处
《物理实验》
北大核心
2009年第5期12-16,共5页
Physics Experimentation
基金
国防科技大学校预研资助项目(No.JC08-02-08)
