SurfaceOxidation FM_SKPM gallium_nitride Moire MultiferroicMaterials Regensburg PolyvinylideneFluoride STO Reduction SFAs Magnetic Force Microscopy BFO Implant I-VSpectroscopy Adhesive PolyvinylAcetate ItoGlass Ni81Fe19 Imprint Bmp Nanopattern LightEmission GalliumPhosphide SThM molecular_self_assembly HACrystal SmalScan Ceramic Crystal non_contact F14H20 Blend Inorganic SiliconCrystal HexagonalBoronNitride