lift_mode StrontiuTitanate PtfeMembrane Pattern Sio2 ForceDistanceSpectroscopy Leakage Conductive AFM Film ConductingPolymer University_of_Regensburg Magnetostrictive AdhesionForce MonoLayer Subhajjit 3-hexylthiophene Vacuum Liquid DNAProtein Pipette OxideLayer Solution PolyvinylideneFluoride Nanostructure Edwin VortexCore C36H74 amplitude_modulation CuFoil NUS oxide_layer China Blood Filter ContactMode