NUS PVAC ElectrostaticForceMicroscopy Jason PinPointMode MfmPhase Hysteresys YttriaStabilizedZirconia LateralPFM LiNbO3 Melt Tape LiBattery Hafnia Stiffness Insulator Heat plastics hydrocarbon University_of_Regensburg AM_KPFM Inorganic_Compound Ceramic Foil Pinpoint MetalCompound Solar blended polymers ring shape Polydimethylsiloxane TCS MESA structure molecular_self_assembly PtfeMembrane CalciumHydroxyapatite