QU Li-hua, WANG Gong-zheng*, ZHANG Jian-min
(College of Physics and Information Technology,Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
In order to get Mn/ZnS quantum dots with stable structures and adjustable fluorescence, the QDs are prepared by solutions of manganese, zinc and sulfur salts. The X-ray diffraction (XRD), atom absorbance system (AAS), fluorescence spectrum and atomic force microscope (AFM) scanning are used to characterize the samples. The morphology is observed by AFM, moreover, the microstructure of manganese can be identified. Our results show that different ratios of Zn and S will induce the difference of luminous intensity and crystal orientations are stable with Mn2+ successfully adding into ZnS crystal. Mn/ZnS nanocrystalline has better luminous properties when Zn∶S is 1∶1. The Mn/ZnS quantum dots made by this method have steady crystal forms and controlled fluorescence.
KeyWords:
Mn/ZnS; quantum dots; preparation; characterization
