电化学法合成强荧光CdTe量子点  

Electrochemical method synthesis of CdTe nanocrystals with strong luminescence

作　　者：睢超霞[1] 张文豪 

机构地区：[1]漯河医学高等专科学校,河南漯河462002 [2]河南省疾病预防与控制中心,河南郑州210093

出　　处：《化学研究与应用》2011年第11期1435-1440,共6页Chemical Research and Application

摘　　要：采用电化学方法产生的H2Te为碲源(Te2-),快速合成了水溶性强荧光的CdTe量子点。该方法具有操作简单、安全、快速廉价和可大量制备等优点。合成过程中考察了合成温度,pH值和配体比例对制备CdTe量子点的影响。在最优化的实验条件下,电化学方法合成的巯基丙酸配位的CdTe荧光量子产率可达到55%;通过紫外可见光谱(UV-Vis)、光致发光谱(PL),荧光寿命衰减曲线,X-射线衍射(XRD),X射线光电子能谱(XPS)和透射电镜(TEM)对合成的CdTe进行了光谱和形貌结构的表征。A facile route to synthesis high-quality CdTe nanocrystals with strong luminescence was designed in aqueous solution using an electrogenerated H2Te as Te source,which is easy to control,safety,cost-efficiency and large-scale.Base on this synthetic route,we systematically investigated the influence of various experimental factors on the synthesis of CdTe nanocrystals,such as the pH,the ratio between ligand and Cd2＋.Under optimal experimental conditions,the quantum yield of theses as-prepared MPA-capped CdTe nanocrystals could reach up to 55%.The spectra and crystal structure of theses CdTe nanocrystals had been investigated by means of UV-Vis absorption,photoluminescence spectroscopy,fluorescence lifetime decay curve,X-ray diffraction（XRD）,X-ray photoelectron spectra（XPS）and transmission electron microscopy（TEM）.

关 键 词：电化学法 CDTE 量子点 强荧光 

分 类 号：O657.3[理学—分析化学]