gallium_nitride OrganicSemiconductor Defect Nanotechnology Hexacontane PinpointNanomechanicalMode Sperm GaN HardDiskMedia PolycrystallineFerroelectricBCZT CuSubstrate atomic_layer Trench WPlug HighResolution FloppyDisk Gold EvatecAG EFMAmplitude MagneticForceMicroscopy Granada FM-KPFM LifeScience Co/Cr/Pt LiftMode StrontiumTitanate Composite FAPbI3 nanomechanical FM_KPFM PiezoelectricForceMicroscopy LeakageCurrent Temperature Zagreb MonoLayer