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Synthesis of PVA capped hexagonal CdS nanocrystals at Room temperature

Author Affiliations

  • 1 Department of Physics, Gauhati University, Guwahati-781014, Assam, INDIA

Res. J. Material Sci., Volume 2, Issue (6), Pages 1-4, December,16 (2014)

Abstract

Cadmium sulphide nanocrystals with Cd:S molar ratio 0.02:0.02 and 0.04:0.04 has been synthesized by chemical coprecipation method at room temperature using poly vinyl alcohol (PVA)as capping agent. The crystallite sizes are determined from XRD analysis. The X-ray diffraction analysis confirms that hexagonal phase cadmium sulphide nanocrystals are formed. The average crystallite sizes are found to be6 nm. From UV-visible spectra the band gap is found to be between 2.53-2.56 eV indicating a significant blue shift from it bulk band gap energy 2.42 eV.

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