polyvinylidene fluoride (PVDF)

Piezoelectric response of graphene-filled PVDF nanocoposites through piezoresponse force microscopy (PFM)

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.

PFM characterization of piezoelectric PVDF/ZnONanorod thin films

The present work reports the development and the piezoelectric characterization of nano-engineered thin-films of Polyvinylidene Fluoride (PVDF) and vertical array of zinc oxide nanorods (ZnO-NRs). In particular, the piezoelectric response of the produced samples was investigated by evaluating the piezoelectric coefficient (d33), through Piezoresponse Force Microscopy (PFM). We compared the piezoelectric response of three different samples: a neat PVDF thin-film, an array of vertically oriented ZnO-NRs and an array of vertically oriented ZnO-NRs embedded in PVDF.

Phase inversion in PVDF films with enhanced piezoresponse through spin-coating and quenching

In the present work, poly(vinylidene fluoride) (PVDF) films were produced by spin-coating, and applying different conditions of quenching, in order to investigate the dominant mechanism of the β-phase formation. The influence of the polymer/solvent mass ratio of the solution, the rotational speed of the spin-coater and the crystallization temperature of the film on both the β-phase content and the piezoelectric coefficient (d33) were investigated.

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