LAUSR

Abstract In this research, magnetite particles in a nanoscale were coated with three various weight percentages of poly (aniline co- o -anthranilic acid) copolymer. Aniline and o -anthranilic acid monomers were copolymerized in the presence of Fe 3 O 4 nanoparticles via surface initiated polymerization method. Characterization of nanocomposites was carried out by several analysis techniques including; FT-IR, FE-SEM, TEM, XRD, TGA and UV–vis-Near infrared. FT-IR results showed that pended COOH groups of PANAA are physically interacted to magnetite nanoparticles. Magnetite nanoparticles enhanced the thermal strength of the nanocomposites in the range of 300–800 °C. The XRD analysis revealed that the average crystallite size ranges from 7.59 to 11.14 nm depending on PANAA weight percentage. Thin films of uniform spherical shape of PANAA/magnetite nanocomposite were fabricated by thermal evaporation technique. The values of E g(direct) and E g(indirect) decreased with increasing the thickness of PANAA, while the conductivity increased with increasing of PANAA thickness coated magnetite particles. The conductivity value ranged from 3.73 to 26.98 Ω −1  cm −1 at a photon energy 3.65 eV. Using the nanocomposites in photovoltaic applications was highlighted.