Al掺杂四针状纳米ZnO生长机制分析 |
| |
引用本文: | 宋述鹏,柯晓明,吴润,刘刚.Al掺杂四针状纳米ZnO生长机制分析[J].武汉冶金科技大学学报,2010(5):538-542. |
| |
作者姓名: | 宋述鹏 柯晓明 吴润 刘刚 |
| |
作者单位: | 武汉科技大学材料与冶金学院,湖北武汉430081 |
| |
基金项目: | 武汉科技大学绿色制造与节能减排科技研究中心资助项目(B0906);武汉科技大学校基金资助项目(2010XZ005) |
| |
摘 要: | 采用热物理法制备不同量Al掺杂的ZnO纳米材料,利用XRD分析掺杂前后试样的物相结构,并通过TEM鉴定粉体中的四针状纳米氧化锌(T-ZnO)结构。结果表明,Al掺杂纳米T-ZnO晶须的结晶过程是气液固(VLS)方式,晶须生长具有择优取向。透射电镜高分辨图像揭示凝固过程中晶须沿0001]轴向生长,随着时间的延长,Zn原子首先形成核心部分并向外在晶须表面呈台阶状生长,从Al液中带走部分Al原子,进而促成纳米晶须的不断伸长且直径变大。
|
关 键 词: | 四针状晶须 生长机制 氧化锌 高分辨像 |
Growth mechanism of tetrapod whiskers of Al-doped nano T-ZnO |
| |
Authors: | Song Shupeng Ke Xiaoming Wu Run Liu Gang |
| |
Affiliation: | (College of Materials Science and Metallurgical Engineering,Wuhan University of Science and Technology,Wuhan 430081,China) |
| |
Abstract: | The Al-doped nano-sized ZnO materials were synthesized by thermal physical method.Firstly,the basic structures of different samples were studied by XRD.And then,the growth mechanism of Al-doped tetrapod nano-whiskers of ZnO(T-ZnO) was investigated by selected area electron diffraction method and high resolution transmission electron microscopy.The analyses of this growth mechanism show that the process is in a gas-liquid-solid(VLS) mode.The nano sized whiskers have optimized / growth orientation.And most of these nano-sized whiskers have high crystal quality.The increased adulteration of Al atoms could improve the formation of nano-sized ZnO whiskers.The starting point of the growth is the nucleus part.Gradually,Zn atoms and some Al atoms form nano-sized whiskers from nucleus in a step-by-step mode. |
| |
Keywords: | tetrapod nano-whiskers growth mechanism ZnO HRTEM |
本文献已被 维普 等数据库收录! |
|