EPFL KPFM ScanningSpreadingResistanceMicroscopy Led Organic Pinpoint PFM NTU LogAmplifier ImideMonomer PetruPoni Modulus FailureAnalysis BTO TriGlycineSulphate GranadaUniv fluorocarbon vertical_PFM Blood temp_control STO LiquidCrystal Praseodymium Magnetic Force Microscopy NCM Nanofiber CuFoil FrictionalForce Iron Gallium heterojunctions pinpoint mode HiVacuum PS_LDPE ContactMode Bio