optical properties of flexible nanocomposites synthesized as powders via the hydrothermal method under ionizing excitations

In this study, cadmium tungstate (cdwo₄) and silver-doped cadmium tungstate (cdwo₄:ag)/polyvinyl alcohol (pva) nanocomposite films were successfully fabricated. the preparation of the nanocomposite films was accomplished through a straightforward hydrothermal procedure following an established protocol. xrd, edx, and fourier-transform infrared (ftir) spectroscopy confirmed the successful synthesis of cdwo₄ and cdwo₄:ag nanopowders. fesem images revealed mean particle sizes of approximately 345 nm for cdwo₄ and 267 nm for cdwo₄:ag nanopowders, respectively. the luminescence characteristics of the synthesized nanoparticles were evaluated under uv irradiation. the cdwo₄:ag nanoparticles exhibited significantly higher luminescence intensity within the blue-green spectrum compared to the pure cdwo₄ sample. the radiative response of the samples was meticulously assessed using an (²⁴¹am) alpha source, with the doped sample demonstrating a marked improvement in the count rate compared to the cdwo₄ composite. furthermore, the cdwo₄:ag composite exhibited acceptable counting efficiency, performing at levels comparable to more expensive alpha counters. these findings suggest that the cdwo₄:ag/pva nanocomposite holds significant potential as an effective scintillation material optimized for radiation detection applications.