Fabrication of novel Ag nanowires/poly(vinylidene fluoride) nanocomposite film with high dielectric constant

A nanocomposite with Ag nanowires embedded into poly-(vinylidene fluoride) (PVDF) has been prepared via a simple casting method. The uniform dispersion of Ag nanowires is characterized by scanning electron microscopy and the dielectric properties of composite films on volume fraction of Ag nanowires and frequency are fully investigated. The percolation threshold of the composite is relatively large, 20 vol.%. The dielectric constant of Ag nanowires/PVDF composite film is as high as 800 in the low-frequency range (100 Hz), and remains at 379 at 1000 Hz with 20 vol.% of Ag nanowires. Meanwhile, the Ag nanowires/PVDF composite film exhibits low dielectric loss of 0.15, which shows potential for applications in advanced electronics. Dependence of the effective dielectric constant of the Ag nanowires/PVDF composites on the Ag nanowires volume fraction at room temperature and 1000 Hz. And the inset is the surface of the composite film (f _Ag=20 vol.%).