self_healing BTO self_assembly PinpointPFM STO HOPG MolybdenumDisulfide ThermalDetectors P3HT PiezoelectricForceMicroscopy high_resolution ForceMapping StrontiumTitanate contact Film Sidewall Jason Conductivity ContactModeDots lithography Gallium_Arsenide Perovskite GalliumPhosphide Cell Croatia FailureAnlaysis Defects CP-AFM BismuthVanadate Polarization SurfaceOxidation Topography Thermoplastic_polyurethane PFM Molybdenum