• Amitava Patra

      Articles written in Journal of Chemical Sciences

    • Synthesis and spectroscopic study of high quality alloy Cd$_x$Zn$_{1-x}$S nanocrystals

      Suparna Sadhu Amitava Patra

      More Details Abstract Fulltext PDF

      In the present study, we report the synthesis of high quality Cd$_x$Zn$_{1-x}$S nanocrystals alloy at 150°C with changing the composition. The shifting of absorption and emission peak in shorter wavelength is obtained with increasing the mole fraction of zinc. The quantum yield (QY) value decreases with increasing the Cd mole fraction and the values are 0.08, 0.13 and 0.40 for Cd0.62Zn0.38S, Cd0.52Zn0.48S and Cd0.31Zn0.69S nanocrystals, respectively after 120 min of reaction. However, the full width at halfmaximum (fwhm) values are 45, 34 and 28 nm and the corresponding quantum yield (QY) values are 0.52, 0.17 and 0.13 for 0.5 mM, 1.5 mM and 3 mM of initial S concentrations, respectively. It is interesting to note that the radiative decay time is dominating with increasing the Cd content. Analysis suggests that the decay dynamics depends on the composition of Cd$_x$Zn$_{1-x}$S nanocrystals.

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