Effect of γ-radiation on the structural and optical properties of poly (3-allyl-5-[(4-nitrophenyl) diazenyl]-2-thioxothiazolidine-4-one) thin films

Thin film of poly (3-allyl-5-[(4-nitrophenyl) diazenyl]-2-thioxothiazolidine-4-
one)(PNPDT) was prepared by thermal deposition technique. Both of the infrared spectra 
and the atomic force microscopy (AFM) confirmed the polymeric nature of PNPDT thin films. 
The layered crystalline structure of the thermally deposited PNPDT thin films in as deposited 
and γ-irradiated conditions was confirmed by X-ray diffraction (XRD) analysis. The effect of γ-
irradiation on the structural and optical properties of 3-allyl-5-[(4-nitro phenyl) diazenyl]-2-
thioxothiazolidine-4-one (NPDT) powder and PNPDT thin films was investigated. The 
polycrystalline NPDT was completely transformed to amorphous phase after γ-irradiation 
with 15 kGy. The optical constants such as refractive index, n, dielectric constant, ε′, lattice 
dielectric constant, ε L, effective mass ratio