Piezoelectric β-polymorph formation and properties enhancement in graphene oxide - PVDF nanocomposite films

► Bulk graphite oxide was exfoliated into graphene oxide nanosheets in DMF solvent. ► PVDF/graphene oxide nanocomposite films were prepared via solution coating method. ► Graphene oxide was homogeneously dispersed and distributed within PVDF matrix. ► PVDF nanocomposite films exhibit a purely β-phase at very low graphene oxide content. ► Tensile properties of PVDF nanocomposites were significantly improved.