Synthesis of CdS Quatum Dots via a Toluene-water Two-phase Approach

doi:10.3969/j.issn.1000-1565.2010.02.014

Abstract

Abstract: To prepare a good performance CdS quantum dots(QDs), synthesis of different size CdS semiconductor quantum via a two-phase approach was performed. The two-phase approach means that a solution of CdOA and oleic acid (OA) in toluene and a solution of thiourea in water, the CdS nanocrystals grew at the liquid-liquid interface. X-ray powder diffraction (XRD),transmission electron microscopy (TEM) technique,fluorescence spectrometer and so on were used to analyze the as-synthesized QDs crystal. As a result, the CdS QDs with narrow sized distribution were cubic structure and had good optical property. Controlling reaction times could synthesize CdS QDs with different sizes and reduce the surface defect, improve the fluorescence intensity:This approach is mild and controllable, and it can be further used in optoelectronics, catalysis, sensing,biological,and other areas.

Key words: CdS, semiconductor quantum dot, two-phase approach

CLC Number:

O614.24

DU Bao-an,NI Mei,JIAO Yong-jing,DU Yan-jun,LI Zheng-ping. Synthesis of CdS Quatum Dots via a Toluene-water Two-phase Approach[J]. Journal of Hebei University (Natural Science Edition), 2010, 30(2): 176-179.

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