HighAcpectRatio Stiffness BiasMode ForceDistanceSpectroscopy FM-KPFM HighAspect Gold Thermoplastic_polyurethane Korea Iron LMF Edwin gallium_nitride LateralPFM InsulatorFilm Vacuum PolyvinylideneFluoride hetero_structure Calcite CuFoil Fe_film University_of_Regensburg ChemicalCompound Co/Cr/Pt piezoelectric force microscopy TempControl Scratch PiezoelectricForceMicroscopy Bacterium YszSubstrate Reduction SetpointMode Hexatriacontane CNT TemperatureControl