piezoelectric force microscopy fe_nd_b AM_SKPM SingleCrystal SRAM HydroGel Techcomp ContactMode ito_film Sulfur Worcester_Polytechnic_Institute chemical_compound Cell LiquidImaging exfoliate Magnetostrictive Praseodymium FrequencyModulation University_of_Regensburg CeramicCapacitor HanyangUniv TemperatureControllerAFM tip_bias_mode CP-AFM Composite fifber FloppyDisk ScratchMode Yttria_stabilized_Zirconia ImideMonomer BismuthFerrite phase_change CNT Fluoride MfmAmplitude