Potential fluoroaalkane Solar UTEM C60H122 Friction Strontium FAFailureAnlaysis KPFM FM_KPFM strontiu_titanate Polyaniline PS_PVAC MBE bias_mode MultiLayerCeramicCapacitor PvdfBead HanyangUniv atomic_layer CVD C_AFM ConductiveAFM dichalcogenide Ferroelectric gallium_nitride high_resolution Vacuum GaN FrictionalForce Cobalt Corrosion Zhi Wafer SiWafer Epoxy