Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1612665 | Journal of Alloys and Compounds | 2014 | 5 Pages |
Abstract
We have synthesized ZnxCd1âxS nanocrystals (NCs) using a microwave assisted method. Zn(Ac)2, CdSO4 and Na2S2O3 were used as the precursors and thioglycerol (TG) was used as the capping agent. Na2S2O3 is a photo and heat sensitive material, which supplies S species needed for the reaction upon dissociation. In this facile method, microwave irradiation provides the activation energy for the dissociation of Na2S2O3 in and leads to the formation of ZnxCd1âxS NCs in 2Â min. The question that to what extent Zn is incorporated into CdS structure was addressed using UV-Vis spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Our results showed that the real value of x in ZnxCd1âxS NCs is less than the initial values of Zn. Also we have given evidence indicating the formation of a gradient alloyed structure for ZnxCd1âxS NCs. The NCs sizes were calculated by effective mass approximation, using real calculated x values. Photoluminescence spectra indicated a blue-shift by increasing x value, which is consistent with band gap shift.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
H. Alehdaghi, M. Marandi, M. Molaei, A. Irajizad, N. Taghavinia,