闪锌矿结构CdS纳米晶的制备

Synthesis of Zinc Blende CdS Nanocrystallites Using 3-Mercaptopropionic Acid as Precursor by Hydrothermal Method

以3-巯基丙酸为硫源,采用水热法制备了尺寸小于10 nm、具有强光致荧光的闪锌矿型立方CdS半导体纳米晶.用EDS能谱、透射电镜(TEM)、高分辨透射电镜(HRTEM)和XRD对晶体的化学成分、大小及结构进行了表征,并分析了影响纳米晶尺寸的因素,研究了闪锌矿型硫化镉纳米晶的荧光激发与发射谱.

Zinc blende CdS nanocrystals with a size about 5 nm acid and cadmium acetate as precursor directly via hydrothermal were synthesized using 3-mercaptopropionic synthesis method. Narrow size-distribution nanocrystals were produced by controlling some main affecting factors. The nanocrystals emit highly symmetric fluorescence. X-ray diffraction, transmission electron microscopy, high resolution electron microscopy, and fluorescence excitation and emission spectroscopy were used to characterize the chemical composition, size, shape, structure and photophysical property of the product. The zinc blende CdS might be of potential value in bio-imaging area.