Tailoring the structural and optical properties of Makrofol/CdS nanocomposite by gamma radiation
E. M. Mahrous, M. ME. Barakat, Radiyah A. Bahareth, K. Benthami, S. A. Nouh
Abstract
We synthesized nanocomposite (NCP) from Makrofol polycarbonate (PC) and Cadmium Sulfide (CdS) nanoparticles (NPs) by means of ex-situ casting procedure. We used thermalizes procedure to prepare the NPs in the presence of nitrogen gas stream. Rietveld refinement of x-rays records illustrated that the CdS has cubic and hexagonal constitutions. Samples from the PC-CdS NCP were exposed to γ dosages ranging from 20 to 250 kGy. The changes in structure and optical properties of the NCP films were investigated based on the γ dosage. The optical bandgap, refractive index, Urbach energy, optical dielectric parameters, chromaticity coordinates, tristimulus values, color intensity and color intercepts have been calculated and interpreted based on γ dosages. The bandgap decreased from 4.20 to 4.11 eV with increasing the γ dosage due to the domination of crosslinking, which damage the crystalline phase as indicated from X-ray diffraction (XRD). Further, the non irradiated PC-CdS NCP film displayed significant color difference by γ irradiation.