掺杂在SiO_2中的ZnSe纳米晶的结构、尺寸及稳定性  

Study on Structure,Size and Stability of ZnSe Nanocrystals Doped in Silica

作　　者：孔凡滔[1] 汪敏强[1] 姚熹[1] 王云鹏[1] 姜海青[1] 

机构地区：[1]西安交通大学电子材料与器件研究所,西安710049

出　　处：《压电与声光》2005年第5期535-537,540,共4页Piezoelectrics & Acoustooptics

基　　金：国家重点基础研究发展计划("九七三"计划)资助项目(2002CB613305);中国-以色列国际合作资助项目(时间:2001-2003)

摘　　要：利用溶胶-凝胶工艺和原位析晶技术,制备出外观透明的ZnSe纳米晶掺杂的S iO2玻璃。利用X-射线衍射研究了S iO2基质中纳米晶的相结构,根据衍射结果,利用谢乐公式计算了纳米晶的尺寸,并使用UV-V is吸收光谱研究了纳米晶尺寸与制备工艺的关系。利用X射线光电子能谱,通过分析纳米晶中Zn,Se的化学状态研究了纳米晶的稳定性问题,结合XRD的分析结果讨论了S iO2基质对钠米晶稳定性的影响。By using Sol-Gel method and in-situ growth technique, the transparent silica glasses doped with ZnSe nanocrystals were prepared successfully. XRD was used to analyze the structure of the nanocrystals and the scherrer formula was adopted to estimate the average size of the nanocrystals. UV-Vis absorption spectra were used to study the relationship between the size of ZnSe nanocrystals and synthesis conditions including ZnSe doping concentration and reducing time. Through analyzing the chemical state of Zn, Sem ZnSe nanocrystals by using XPS, the stability of the nanocrystals and the effect of silica matrix on their stability are discussed in this paper.

关 键 词：ZNSE 溶胶-凝胶法 相结构 尺寸 稳定性 

分 类 号：O482[理学—固体物理]