Solution ContactMode medical PinpointNanomechanicalMode Regensburg ScanningIon-ConductanceMicroscopy Gold ForceVolumeMapping Ferrite semifluorinated alkane FM-KPFM Indent Magnets Piranha Optic mfm_amplitude Praseodymium LMF Optical Liquid GaP contact ito_film Chungnam_National_University Sic fluorocarbon Conductance University_of_Regensburg Piezo OpticalWaveguides multi_layer AtomicLayer 2d_materials ConductiveAFM Morphology