DeflectionOptics sputter AlkaneFilm Granada nanobar ring shape SingleCrystal dielectric trench BCZT tip_bias_mode University_of_Regensburg PvdfFilm Thermal Cobalt-dopedIronOxide SrTiO3 PolyvinylideneFluoride conductive PiezoelectricForceMicroscopy Oxide Vanadate CarbonNanotube Gallium_Arsenide EPFL Worcester_Polytechnic_Institute EFMAmplitude molecules Defects Organic mechanical_property HexagonalBN ChemicalCompound Domain Pore NtuEee SetpointMode