Effective interactions and dielectric study of polymer nanocomposite thin films of polyvinylidene fluoride and graphene oxide

Polyvinylidene fluoride (PVDF) is a well-known fluoropolymer for its electronic applications. The present work investigates the influence of Graphene oxide (GO) in various weight percentages over the dielectric profile of the PVDF matrix. Field emission scanning electron microscopy (FESEM) is used to explain the morphological features of the samples. The thermal stability of the PVDF polymer with the addition of GO was studied using thermogravimetric analysis (TGA). X-ray diffraction spectroscopy (XRD), confocal Raman microscopy (CRM), and Fourier Transform infrared spectroscopy (FTIR) were used to interpret the appreciable interfacial interactions between the matrix and the nanofiller and possible phase transformations. The presence of polar and non-polar polymorphic phases in PVDF was verified with the help of XRD, FTIR, and CRM analyses. The band gap energy of the samples was determined using the Tauc-plot method from UV-visible observations. The variation in the polarity of the matrix with the inclusion of GO is also noted. The dielectric and AC conductivity measurements were done at 100 Hz and 2 MHz. All these ascertain the candidacy of PVDF/GO nanocomposite thin films to be incorporated into electronic devices of this era.