以Na2TeO3为碲源制备CdTe纳米晶及其表征

本文以巯基乙酸作为稳定剂,在水相中制备了CdTe纳米晶。以亚碲酸钠作为碲源,从而避免了以H2Te或NaHTe（用碲粉和硼氢化钠合成）作为碲源时,需要氮气或其它气体作为保护气体的过程,简化了制备工艺,并且提高了CdTe纳米晶的产量。用X射线衍射仪（XRD）、透射电镜（SEM）和荧光分光光度计对其进行了表征。分析表明CdTe纳米晶为立方相,并且有较窄的荧光发射峰。详细探讨了反应时间、pH值及前驱物浓度对CdTe纳米晶荧光性能的影响。     

Characteristics of CdTe nanocrystals synthesized by a Na_2TeO_3 source

Water-soluble cadmium telluride(CdTe) nanocrystals were synthesized in aqueous solution with thioglycolic acid(TGA) molecules as a stabilizer.A series of TGA-stabilized CdTe nanocrystals were prepared using sodium tellurite as a tellurium source,which avoids the cumbersome processes associated with H_2Te or NaHTe sources.The synthesized TGA-stabilized CdTe were characterized with X-ray diffraction,TEM and fluorescence spectrophotometer.The particles crystallized predominantly in cubic phase with narrow p...