EPR AND OPTICAL STUDIES OF ZnS: Mn NANOPARTICLES

摘要

Mn-doped ZnS nanoparticles are prepared by chemical method without using any extra capping agent. The electronic structure of Mn-doped ZnS nanoparticles is studied with electron paramagnetic resonance (EPR). The size of the particle is determined by X-Ray line broadening. The average size of primary crystallite nanoparticle was found to be ~ 2 nm. UV-Visible optical absorption study is used to determine the optical band gap of the nanocrystalline. The photoluminescence and EPR spectra of the sample confirm the incorporation of Mn2+in ZnS nanocrystals. The spectroscopic splitting factor of the sample g = 2.0270, the hyperfine splitting constant A=60×10-4cm-1and the crystal field strength D= 66×10-4cm-1