Step Austenite Chemical Vapor Deposition PVAP3HT Ucl HardDiskMedia PvdfFilm UnivCollegeLondon self_assembly Cross-section non_contact DIWafer Magnetic Ecoli Magnetostrictive CeramicCapacitor Gallium Force-distance SKPM mechanical_property IIT-chennai Roughness MultiLayerCeramicCapacitor Hydroxyapatite BTO Logo PiezoelectricForceMicroscopy ContactMode flakes SolarCell Foil FrictionalForceMicroscopy Workfunction amplitude_modulation SingleCrystal