Facile and green synthesis of 1-thioglycerol capped CdSe quantum dots in aqueous solution
Materials Chemistry and Physics(2018)
摘要
CdSe quantum dots (QDs) have been synthesized in aqueous solutions of Cd(NH3)4SO4 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.
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关键词
CdSe QDs,1-Thioglycerol,Green synthesis,Optical properties
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