Ricerc@Sapienza

This study presents a comparison of the piezoelectric properties of nanostructured thin films made of arrays of vertically oriented ZnO-nanorods (ZnO-NRs) over ITO-glass substrate and of ZnO-nanowalls (ZnO-NWs) over aluminium substrate. Both nanostructures were synthesized on a large area through chemical bath deposition. The morphological, structural, and chemical characteristics of the produced nanostructures were investigated in order to assess the crystal quality and purity.

The piezoelectric properties of PVDF mainly depend on its β-phase. In this work, we investigated through Piezoresponse Force Microscopy (PFM) the piezoelectric properties of PVDF composite films when we induce the formation of β-phase crystals adding a nanofiller, like graphene nanoplatelets (GNPs) or zinc-oxide nanorods (ZnO-NRs), but without applying any electrical poling. At first, we fabricated piezoelectric PVDF nanocomposite films by the solution casting method.

The piezoelectric properties of Poly(vinylidene fluoride) (PVDF) mainly depend on its most polar ?-phase. In this work, we investigated through Piezoresponse Force Microscopy (PFM) the piezoelectric properties of PVDF composite films when we induce the formation of ?-phase crystals adding graphene nanoplatelets (GNPs) without any chemical modification or poling. At first, we fabricated GNP-filled PVDF composite films by the solution casting method.