FAPbI3 Corrosion Magnetic Force Microscopy Mapping Lanthanum_aluminate Silver PFM BFO membrane Metal kelvin probe force microscopy Pyroelectric ItoGlass Wonseok 2dMaterials Magnets Film Electical&Electronics Dr.JurekSadowski contact VerticalPFM mfm_amplitude Fluoride Regensburg Wafer CeramicCapacitor Yeditepe_University TempControl nanomechanical YszSubstrate Forevision PVA CarbonNanotube Piranha Styrene