Study of Different Capping Agents Effect on the Structural and Optical Properties of Mn Doped ZnS Nanostructures

In this work, we report effect of different capping agents on structural and optical properties of Mn doped ZnS (ZnS:Mn),which were prepared by co-precipitation method using the solution of ZnCl2, Na2S as sources for zinc and sulfur, respectively and MnCl2 as doping agent ,thioglycerol(TG), mercaptoethanol (ME), sodium hexaetaphosphate (SHMP) as capping agents for control particles size. The optical absorption spectra of the samples obtained using UV-Vis spectrophotometer shows the blue-shift with decreasing particle size. The value of band gap energy has been found to be in range 4.07-4.57 eV This behavior is related to size quantization effect due to the small size of the particles.So-prepared Mn doped ZnS nanoparticles then characterized by using X-ray diffraction (XRD). The size of the particle is found to be in 2.20-2.67 nm range. TEM image shows morphology of TG and ME- capped ZnS:Mn nanostructures.