Temperature dependent Synthesis of Zinc Sulfide Nanocrystals

Chemical reduction route is preferred to prepare ZnS semiconductor nanoparticles at three different temperatures without any subsequent heat treatment. The grown nanoparticles are investigated using X-ray diffraction (XRD), Transmission electron microscopy (TEM), Scanning electron microscopy (SEM), Fourier Transform Infrared (FTIR) Spectroscopy, Ultraviolet-Visible (UV-Vis) Absorption and Photoluminescence (PL) spectroscopy for structural and optical analysis. From the investigation, it is seen that the crystal size appears to increase with an increase in synthesis temperature. The cubic crystal structure is shown in XRD analysis. The UV-Vis spectrum shows the increase in the band gap which supports quantum confinement effect. The PL spectrum of ZnS nanocrystals displays a visible violet spectrum. The FTIR spectra determine the absorbance and nature of bonds present in samples.