BiFeO3 chemical_compound Fluoride high_resolution mfm_amplitude WWafer HDD vertical_PFM HanyangUniv RedBloodCell Fe_film CBD Steps ScanningSpreadingResistanceMicroscopy dielectric trench MeltingPoint piezoelectric force microscopy Conductance self_assembly Blood PECurve LaAlO3 Thermal PatternedSapphireSubstrat Chromium Dr.JurekSadowski ForceVolume MfmPhase Global_Comm Modulus nanobar PVAP3HT LeakageCurrent SingleLayer Polydimethylsiloxane