BTO SiliconeOxide FrictionalForceMicroscopy domain_switching Pinpoint Phenanthrene Force-distance Hexylthiophene Deposition silicon_oxide HardDiskMedia HighResolution membrane Writing Bismuth Silicon Roughness Self-assembledMonolayer FM_SKPM PS_PVAC flakes BismuthVanadate Bio NtuEee sputter Modulus Magnets hard_disk_media ito_film Hole Plug molecular_self_assembly Ito IVSpectroscopy PvdfFilm