▎ 摘　　要

NOVELTY - Polymer nanocomposite film comprises polyvinylidene fluoride (PVDF), graphene oxide, and chromium-doped nickel ferrite nanoparticles. USE - Polymer nanocomposite film for developing electrical devices such as capacitors, sensors, and energy storage devices. ADVANTAGE - The polymer nanocomposite film is flexible and free-standing, and has significantly enhanced dielectric behavior, and significant impact on the field of polymer nanocomposites. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a method for improving dielectric behavior of a polymer nanocomposite film comprising PVDF, graphene oxide, and chromium-doped nickel ferrite nanoparticles, which comprises optimizing the particle aspect ratio, particle size, particle orientation, and particle dispersion of the ferromagnetic nanoparticles; and (2) a nanocomposite film, which comprises a combination of polyvinylidene difluoride, a dispersion of graphene oxide (GO), and chromium-doped nickel ferrite (NFCr) in a solvent, where the GO and NFCr are synthesized by Hummer's and sol-gel methods, respectively, and the film is prepared by solvent casting and drying.