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Aluminum oxide nanoparticles Al2O3 were prepared and both the obtained structure and size of the prepared Al2O3 nanoparticles were studied via X ray diffraction XRD and transmission electron microscopy TEM The average particle size of Al2O3 was estimated to be 31 nm The effect of adding different concentrations of Al2O3 and gamma radiation on the structure and optical properties of polystyrene PS has been investigated using XRD and UV spectroscopy The obtained XRD data shows that the addition of different concentrations of Al2O3 influenced the crystallinity of the resulting nanocomposites consequently changing the lattice parameters significantly The influence of Al2O3 nanoparticles on optical parameters of PS such as absorbance transmittance refractive index real and imaginary parts of dielectric complex and optical conductivity have been investigated This study reveals that the increasing of Al2O3 have effect on all these parameter
