Regensburg BCZT Polyurethane Wang C36H74 Mapping Filter Hexacontane Transparent NiFe Plug TransitionMetal PECurve Zhi Cobalt Hexylthiophene Domain PetruPoni_Institute SmalScan Bismuth nanomechanical Ananth Layer Litho EFM Insulator Fujian HydroGel Electrode CopperFoil HiVacuum PyroelectricDetector LateralPFM align Boundary