Zinc sulfide (ZnS) nanoparticles were synthesized by the wet chemical method. The crystal structure
and grain size of the particles were determined, using X-ray diffraction (XRD). The optical properties
were studied by the Ultraviolet-Visible (UV-Vis) absorption spectrum. The dielectric properties of ZnS
nanoparticles were examined using a HIOKI 3532-50 LCR HITESTER over the frequency range of 50 Hz –
5 MHz at different temperatures. The variation of the dielectric constant and dielectric loss were
studied. The dielectric constants of the ZnS nanoparticles are high at low frequencies, and decrease
rapidly when the frequency is increased. Further, electronic properties like valence electron plasma
energy, Penn gap, Fermi energy and electronic polarizability of the ZnS nanoparticles, were estimated.
Key words: Nanoparticles, zinc sulfide (ZnS), x-ray diffraction (XRD), ultraviolet (UV) analysis, dielectric
constant and dielectric loss.