Pinpoint PFM Tungsten PvdfBead MagneticForceMicroscopy piezoelectric force microscopy #Materials Cobalt-dopedIronOxide LifeScience NUS_NNI_Nanocore BloodCell amplitude_modulation tip_bias_mode SingleCrystal Lift PVAP3HT Sic Switching NTU PMNPT SrTiO3 suspended_graphene BTO PatternedSapphireSubstrat PhaseImaging exfoliate SurfaceOxidation Piezoresponse Ceramics CopperFoil Polyvinylidene_fluoride rubber AnodizedAluminumOxide CP-AFM Organic EFM