一种提高SiO_2凝胶玻璃中ZnSe纳米晶稳定性的方法  

Enhancement of the Stability of ZnSe Nanocrystals Doped in Silica by a New Method

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

机构地区：[1]西安交通大学电子陶瓷与器件教育部重点实验室,西安710049

出　　处：《高等学校化学学报》2005年第1期155-157,共3页Chemical Journal of Chinese Universities

基　　金：国家重大基础研究发展计划 (批准号 :2 0 0 2 CB613 3 0 5 );中国 -以色列国际合作项目资助

摘　　要：ZnSe nanocrystals doped in silica were prepared by using sol-gel process and in situ growth technique. It was found that when n(Zn)∶n(Se)=1∶1 in the sol precursor, the resultant ZnSe nanocrystals were rather instable and after several days the color of the ZnSe nanocrystals-doped SiO 2 glass changed from yellow to red. According to the analysis results of XRD, UV-Vis transmission spectra and XPS, the existence of many zinc vacancies in the ZnSe nanocrystals was considered as the reason of the instability. Based on this reason, the synthesis process was improved by introducing much larger amount of zinc to the precursor sol and this made the stability of the ZnSe nanocrystals improved greatly from several days to more than 6 months.ZnSe nanocrystals doped in silica were prepared by using sol-gel process and in situ growth technique. It was found that when n(Zn)∶n(Se)=1∶1 in the sol precursor, the resultant ZnSe nanocrystals were rather instable and after several days the color of the ZnSe nanocrystals-doped SiO 2 glass changed from yellow to red. According to the analysis results of XRD, UV-Vis transmission spectra and XPS, the existence of many zinc vacancies in the ZnSe nanocrystals was considered as the reason of the instability. Based on this reason, the synthesis process was improved by introducing much larger amount of zinc to the precursor sol and this made the stability of the ZnSe nanocrystals improved greatly from several days to more than 6 months.

关 键 词：ZNSE 纳米晶 稳定性 Zn空位 

分 类 号：O482[理学—固体物理]