摘要
采用硒粉、氨基硫脲和硝酸镉为原料,以油酸和水合肼作为溶剂,在水-油界面反应体系下,成功合成CdS1-xSex量子点。通过改变反应物的摩尔比成功控制了CdS1-xSex量子点的组成比,研究了CdS1-xSex量子点的组成对其性质(光致发光、紫外吸收性能)的影响:TEM图谱显示CdS1-xSex量子点尺寸分布较均匀,直径约5-10nm;XRD图谱揭示CdS1-xSex的晶格常数a和c与其组成比成一次线性关系,荧光光谱与紫外可见吸收光谱揭示了CdS1-xSex量子点的光学性质与其组成之间的依赖关系。
CdS1-xSexquantum-dots have been prepared by a water-oil interface method.In this reaction,Se power,thiosemicarbazide（NH2SNHNH2）,and Cd（NO3）2 were used as precursors,oleic acid and N2H2·H2O were chosen as surfactant instead of expensive and virulent precursors such as TOPO,TOP and Na2SeO3.The chemical composition and properties of the CdS1-xSex nanocrystals can be adjusted via different molar ratio of source material.The lattice parameters（a,c） calculated from XRD patterns increase linearly with increasing of S content,which is consistent with Vegard＇s law.The CdS1-xSex nanocrystals have an average radio about 5-10nm.The composition dependence of UV-vis spectra and the fluorescence luminescence（FL） spectra of the series CdS1-xSex nanocrystals has been revealed.
出处
《安徽建筑工业学院学报（自然科学版）》
2010年第1期87-91,共5页
Journal of Anhui Institute of Architecture(Natural Science)
基金
安徽建筑工业学院青年基金(20090906)
