Polarization Sapphire chemical_compound MagneticPhase FAFailureAnlaysis nanomechanical LateralForceMicroscopy AdhesionForce atomic_steps Piezoresponse LateralPFM Graphite AM_KPFM PVAP3HT NTU Vortex PDMS Styrene PS_LDPE Protein Led atomic_layer Solar small_scan exfoliate Layer NusEce ElectrostaticForceMicroscopy Polyimide ScanningTunnelingMicroscopy Metal align frequency_modulation LightEmiting Perovskite