MultiferroicMaterials FFM Nanopattern Cobalt-dopedIronOxide Worcester_Polytechnic_Institute Growing Mechanical&nanotechnology HexagonalBN Current MechanicalProperty ScanningKelvinProbeMicroscopy Polyimide Thermoplastic_polyurethane NusEce BloodCell OpticalWaveguides VortexCore Dr.JurekSadowski PhaseImaging BTO hard_disk Pinpoint PFM self-assembly EFM Optoelectonics CVD UnivOfMaryland CalciumHydroxide kelvin probe force microscopy Lateral_Force_Microscopy Ni81Fe19 Sulfur thermoplastic_elastomers Roughness PiezoelectricForceMicroscopy