PUR Granada PinpointPFM Magnetic Force Microscopy OpticalWaveguide ferromagnetic Phosphide BiVO4 FloppyDisk Non-ContactMode Wildtype KelvinProbeForceMicroscopy HighAcpectRatio Optical #Materials Ferroelectric Carbon Subhajjit Scratch lift_mode Array semifluorinated_alkane HighAspect Stiffness atomic_steps Filter Co/Cr/Pt Indent LMF Foil CrystalGrowing high_resolution Pores BFO silicon_carbide