Dielectric behaviour and ac electrical conductivity analysis of ZnSe chalcogenide nanoparticles

Zinc Selenide nanoparticles were synthesized successfully by microwave heating process. The phase of the synthesized nanoparticle was confirmed by powder X-ray diffraction analysis. The homogeneity and morphology of the synthesized nanoparticles was confirmed by scanning electron microscopy study. Further, the crystallite size was calculated by Scherer formula and found 32 nm. The average particle size of the synthesized nanoparticles was measured and found 45 nm, which is in close approximation with each other. The temperature and frequency dependence of dielectric constant and ac electrical conductivity measurements of the synthesized nanoparticles were carried out for the first time. Few anomalies in dielectric studies were observed near 200 and 375 oC, respectively. These points were related to glass and amorphous to crystalline phase transitions, respectively. The variation of activation energy and conduction behavior has been studied in the vicinity of transition temperatures in the ac conductivity measurements.