PS_PVAC LiftHeight VortexCore University_of_Regensburg GaN TiO2 Corrosion Vac PhaseTransition margarine Glass MoirePattern silicon_oxide block_copolymer YttriaStabilizedZirconia Cross-section Fendb Blend amplitude_modulation Worcester_Polytechnic_Institute PtfeMembrane GlassTemperature heterojunctions SingleLayer mechanical_property MechanicalProperties plastic Platinum Piezoelectric Polyvinylidene_fluoride PetruPoni_Institute Piezo Sidewall thermal_property PvdfFilm