temperature controller AFM Piezoresponse Polyaniline BaTiO3 Vacuum ScanningSpreadingResistanceMicroscopy Step Materials Ecoli PS_PVAC TCS FM_KPFM plastic Calcium SThM FM-KPFM Etch PolyimideFilm LateralPFM FuelCell VortexCore Metal-organicComplex Wafer graphene_hybrid ForceDistanceSpectroscopy NTU Corrosion AIN PANI CopperFoil FrictionalForce PhaseImaging IndiumTinOxide Pinpoint PFM SelfAssembly