2024 : 5 : 23
Maziyar Marandi

Maziyar Marandi

Academic rank: Associate Professor
ORCID: https://orcid.org/0000-0002-4882-2033
Education: PhD.
ScopusId: 55650454400
Faculty: Science
Address: Arak University
Phone:

Research

Title
Facile synthesis of gradient alloyed ZnxCd1-xS nanocrystals using a microwave-assisted method
Type
JournalPaper
Keywords
ثبت نشده‌است!
Year
2014
Journal Journal of Alloys and Compounds
DOI
Researchers H Alehdaghi ، Maziyar Marandi ، Majid Molaei ، A Irajizad ، Nima Taghavinia

Abstract

We have synthesized ZnxCd1-xS 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 ZnxCd1-xS NCs in 2 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 ZnxCd1-xS NCs is less than the initial values of Zn. Also we have given evidence indicating the formation of a gradient alloyed structure for ZnxCd1-xS 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. (C) 2013 Published by Elsevier B. V.