期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
ZnS:Co^(2+)半导体纳米晶的制备及性能研究
1
作者 张锦瑾 余萍 +1 位作者 陈思应 谢瑞士 《化学研究与应用》 CAS CSCD 北大核心 2010年第5期605-608,共4页
ZnS∶Co2+ nanocrystals were prepared in aqueous solution by both one-step and two-step methods.The surface of the prepared ZnS∶Co2+ nanocrystals was modified by mercaptoacetic acid(TGA).The UV-vis absorption spectros... ZnS∶Co2+ nanocrystals were prepared in aqueous solution by both one-step and two-step methods.The surface of the prepared ZnS∶Co2+ nanocrystals was modified by mercaptoacetic acid(TGA).The UV-vis absorption spectroscopy was employed as a direct probe to detect the location of Co2+ dopant in ZnS∶Co nanocrystals.The transition of Co2+4T1g(F)→4T1g(P)was observed from the ZnS∶Co2+ nanocrystals derived by the one-step sample,and the Co2+ 4A2(F)→4T1(P)transition was detected from the ZnS∶Co2+ nanocrystals derived by the two-step sample.The results indicate that Co2+ existed on the surface instead of in the lattice of ZnS nanocrystals derived by the one-step method.And for those ZnS∶Co2+ nanocrystals by using the two-step method,Co2+ were co-precipitated in the lattice of ZnS nanocrystals.And additionally,the band gap of the lattice co-precipitated doped ZnS∶Co2+ nanocrystals was narrower than the pure ZnS samples. 展开更多
关键词 ZnS:Co2+ 巯基乙酸 紫外-可见吸收光谱
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部