Structural and Optical Studies of Confined ZnS Nanoparticles Synthesized by Chemical Precipitation Method

Authors: Dr N Manivannan, Dr B Chandar Shekar, Dr Matheswaran, Dr C K Senthilkumaran

Country: India

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Abstract: ZnS nanoparticles were synthesized by chemical precipitation method at room temperature. From X-ray diffraction (XRD) pattern, the crystallite size evaluated to be 2 nm to 4 nm. Scanning electron microscopy (SEM) showed agglomerated grains with random shape. EDAX spectra indicated the presence of Zn and S elements in the samples.. High Resolution Transmission Electron Microscopy (HRTEM) images revealed the nanocrystalline nature of the sample with distinct grain boundaries having average particle size of 3nm. The band gap energies were estimated by diffused reflectance spectra (DRS) of the ZnS samples were found to be higher than the band gap of the bulk ZnS. Photoluminescence spectra (PL) is observed to be broad and an emission occurred at a lower energy value than that corresponding to the excitonic emission band due to quantum confinement

Keywords: Nanoparticles, exciton, Bohr radius ,Confinement

Paper Id: 360

Published On: 2018-11-06

Published In: Volume 6, Issue 6, November-December 2018

Cite This: Structural and Optical Studies of Confined ZnS Nanoparticles Synthesized by Chemical Precipitation Method - Dr N Manivannan, Dr B Chandar Shekar, Dr Matheswaran, Dr C K Senthilkumaran - IJIRMPS Volume 6, Issue 6, November-December 2018.

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