Conductive AFM Spain Tin sulfide Yeditepe_University layers FloppyDisk Polytetrafluoroethylene MfmPhase Adhesion CrossSection AtomicSteps Self-assembledMonolayer ScanningTunnelingMicroscopy fluoroalkane Bismuth LiquidImaging Gallium VerticalPFM LithiumNiobate Carbon Cobalt HydroGel Flake Chemical_Vapor_Deposition Magnets CVD NUS_NNI_Nanocore ForceDistanceSpectroscopy Co/Cr/Pt high_resolution Holes Defects Composition Chungnam_National_University Nanofiber