Applied Physics Letters · 2006 · 164 citations · 12 references
EngineeringPiezoelectric PropertiesChemistryVinylidene FluorideConducting PolymerPolymer MaterialPolymer TechnologyFerroelectric ApplicationPiezoelectric MaterialHybrid MaterialsPolymer ChemistryMaterials SciencePiezoelectricityCrystallization MechanismPolymer ScienceApplied PhysicsFerroelectric MaterialsThin FilmsHydrate SaltFunctional Materials
β -phase dominant poly(vinylidene fluoride) (PVDF) ferroelectric thin films were obtained on silicon substrates by spin coating the precursor solutions with addition of hydrate salt and drying at an elevated temperature. The remnant polarization of the dense β-phase dominant PVDF thin film was 69.5mC∕m2. The apparent longitudinal piezoelectric coefficient d33 was −17.4pm∕V without taking into account the substrate clamping effect. It was suggested that the hydrate salt functioned as nucleation sites for the crystallization of PVDF molecules, and the intermolecular hydrogen bonding together with dipolar interactions promoted all-trans conformation and β-phase formation.
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