FrequencyModulation ferromagnetic Scanning_Thermal_Microscopy Morphology Graphene FM_SKPM Plug ContactModeDot OpticalElement Wildtype BismuthVanadate epitaxy Heating Vinylpyridine food Formamidinium_lead_iodide Phase PiezoelectricForceMicroscopy EFMAmplitude Cross-section Beads PinPointMode Adhesive SPMLabs Composite flakes Logo Polyurethane self-assembly Polypropylene hard_disk SingleLayer Pzt Conduct HOPG