Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 214, Issue -, Pages 320-329Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2018.04.116
Keywords
CdSe QDs; 1-Thioglycerol; Green synthesis; Optical properties
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Funding
- DAE
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CdSe quantum dots (QDs) have been synthesized in aqueous solutions of Cd(NH3)(4)SO4 and Na2SeSO3 in the presence of 1-thioglycerol at ambient conditions. These QDs were found to exhibit very sharp excitonic absorption peak between 400 and 430 nm and a second peak at around 360 nm and exhibit very broad fluorescence in the entire visible range with a large stokes shift. The QDs were monodisperse and stable under ambient conditions for several months. Their optical properties were found to have a strong correlation with the stoichiometric ratios of Cd:Se.1-Thioglycerol was found to play a dual role in the synthesis of CdSe QDs, (i) catalyses the reaction to form CdSe and (ii) acts as a capping agent for these QDs. An in depth study of their electrochemical analysis have been made and a probable reaction mechanism for the formation of these QDs has been provided. (C) 2018 Elsevier B.V. All rights reserved.
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