PtfeFilter VortexCore Deposition ring shape Microchannel MultiferroicMaterials Ferroelectric C_AFM TungstenThinFilmDeposition food Thermal Ni81Fe19 Defects BismuthVanadate LithiumNiobate Ptfe PUR SiliconCrystal Film kelvin probe force microscopy NUS_Physics rubber silicon_carbide WWafer SingleLayer SiliconOxide Phenanthrene Wafer Ito Glass WS2 SelfAssembly Aggregated_molecules Pores Anneal