摘要
通过添加不同类型的表面活性剂在水相中制备了CdSe量子点。用透射电子显微镜(TEM)、X射线衍射(XRD)、X-射线光电子能谱(XPS)对其进行了表征,并用紫外-可见(UV-Vis)和荧光(PL)分光光度法研究了不同类型的表面活性剂对CdSe量子点吸收光谱和荧光光谱的影响。结果表明,加入长链的非离子型和阴离子型表面活性剂制备的CdSe量子点颗粒只有几个纳米,分散性好,量子点的荧光强度也有明显的增强,而加入阳离子表面活性剂制备的量子点颗粒团聚明显,其荧光出现淬灭。
CdSe quantum dots were prepared in aqueous phase by addition of different surfactants and were characterized by TEM,XRD,XPS.The effect of the surfactant on the spectra of CdSe quantum dots was studied with the UV-Visible（UV-Vis） and photoluminenscence（PL） spectroscopy.The results show that several nanometer-sized,well-dispersed,fluorescence-enhanced CdSe quantum dots could be obtained by addition of long-chain anionic and non-ionic surfactants.However,the fluorescence of CdSe quantum dots is quenched and the particle aggregation occurs easily by addition of cationic surfactants in the preparation.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2012年第3期509-514,共6页
Chinese Journal of Inorganic Chemistry
基金
国家民委科研项目(No.09ZN02)资助
