KPFM Cobalt LogAmplifier HardDisk Formamidinium_lead_iodide ScanningSpreadingResistanceMicroscopy ContactModeDots SRAM Roughness OpticalWaveguide CalciumHydroxide DeoxyribonucleicAcid ContactMode Dopped ULCA Mechanical Epoxy Calcite Polarization SurfaceOxidation Cross-section Phosphide GlassTemperature UnivMaryland University_of_Regensburg Al2O3 CP-AFM KAIST ForceMapping Mapping Ca10(PO4)6(OH)2 Flake OxideLayer Resistance LightEmission