PinPointMode SrTiO3 VerticalPFM Non-ContactMode Friction suspended_graphene Optic PhaseTransition Gong hydrocarbon Bio Ceramics SingleLayer Optoelectronic kelvin probe force microscopy Sic PolyStylene Worcester_Polytechnic_Institute Polytetrafluoroethylene dielectric trench medical ContactModeDots Varistor exfoliate LiquidCrystal BTO PolycrystallineFerroelectricBCZT Scanning_Thermal_Microscopy PetruPoni_Institute Pore Vanadate Foil LeakageCurrent AM-KPFM Multiferroic_materials