EFM Floppy ContactModeDots semifluorinated_alkane SThM Optoelectonics FM_SKPM pinpoint mode Polydimethylsiloxane Tin disulfide ScanningTunnelingMicroscopy PetruPoni DomainSwitching Temperature dielectric trench PhaseImaging PolyStylene TemperatureControllerStage Silicon Boundary BiVO4 mechanical_property MultiferroicMaterials TPU Adhesion light_emitting Vanadate Pipette AnodizedAluminumOxide Layer Self-assembledMonolayer SKPM self-assembly Lift Electronics