摘要
以巯基乙酸为稳定剂在水相中制备了碲化镉纳米粒子[TGA-CdTe],用紫外-可见吸收光谱和荧光光谱研究了它们的发光特性,并且用X射线粉末衍射(XRD)、透射电子显微镜(TEM)表征了他们的结构、形貌和化学组成。与此同时,研究了H2O2的加入对该纳米粒子吸收光谱和荧光发射光谱的影响,实验表明,H2O2的加入使得该纳米荧光探针的吸收和发射光谱强度强度均明显减弱。据此,可望将纳米荧光探针应用于生物化学和环境化学中H2O2的分析测定。
CdTe quantum dots were synthesized in aqueous solution with thioglycolic acid as stabilizer.Their luminescence characterization was studied by UV-Vis absorption spectra and fluorescence spectra.The nancrystals were characterized by X-ray powder diffraction（XRD）,transmission electron microscope（TEM）,which were used to characterized their structure,shape and composition.Effects of Hydrogen Peroxide on the UV spectra and fluorescence spectra of the functionalized CdTe have also been studied.The intensities of UV pectra and fluorescence of the functionalized CdTe are quenched by Hydrogen Peroxide.The functionalized colloidal solutions prepared are hopeful of use as fluorescence probes in biological and environmental samples.
出处
《宿州学院学报》
2007年第5期106-108,50,共4页
Journal of Suzhou University
基金
安徽省教育厅自然科学研究项目(2006KJ161B)
宿州学院自然科学研究项目(2007YZK006)
关键词
量子点
荧光猝灭
过氧化氢
Quantum dots
Fluorescence quenching
Hydrogen Peroxide
