epitaxy vertical_PFM strontiu_titanate semifluorinated alkane multi_layer Polarization LightEmiting Electronics FAPbI3 Polytetrafluoroethylene Polydimethylsiloxane Perovskite Plug HBN semifluorinated_alkane BiFeO3 hetero_structure HighResolution FuelCell Array BloodCell Multiferroic_materials StainlessSteel LifeScience BariumTitanate Oxide Fiber oxide_layer Temperature WS2 Sulfur GaN Polyethylene Led Mapping