Ptfe mfm_amplitude molecule MechanicalProperty atomic_layer WPlug FailureAnalysis WS2 Fet HardDisk Titanate ScanningTunnelingMicroscopy TipBiasMode Hexacontane PVA Array OpticalElement FloppyDisk Flake HanyangUniv LiftMode Phthalocyanine Phase blended polymers Force-distance Sidewall Current TemperatureControllerStage Self-assembledMonolayer hard_disk EFMAmplitude NiFe GlassTemperature mono_layer neodymium_magnets