Preparation, Properties, and Characterization of ZnS nanoparticles

This paper studied, the structural, microstructural, thermal, electrical, and dielectric properties of ZnS nanoparticles synthesized using the co-precipitation technique. The precipitate was characterized by X-ray diffraction (XRD) which confirmed the formation of a single-phase cubic nanocrystalline structure; crystalline size was obtained with different three models.

Information regarding thermal transition such as melting, oxidation, and crystallization was revealed using Differential scanning calorimetry and thermogravimetry (DTG/TG).

Transmission electron microscopy (TEM) images were performed to explore the stability, morphology, and other properties of ZnS nanoparticles. An EDX analysis was applied to confirm the constituents and an element estimation. For the importance of the crystallite size of the prepared ZnS different techniques were utilized to estimate the crystallite size, and the calculations confirmed the formation of ZnS in nanocrystal form. The electrical and dielectric properties of the synthesized nanocrystals were measured at different temperatures over a wide range of frequencies from about 50 Hz up to 5 MHz. Regarding the frequency dependence of both the AC conductivity and dielectric constant, the conduction mechanism and the source of the relaxation were revealed.

at different temperatures over the completely studied range of frequency, The real part of electric modulus (M') and imaginary part of electric modulus (M'') components were calculated and (M'') showed an asymmetrical peak approximately centered in the dispersion region of M"(ω). The Activation energy (E_a) was found to decrease with increasing frequency.