ForceVolumeImage ShenYang Sio2 LeakageCurrent UnivCollegeLondon Fiber Calcite BiFeO3 neodymium_magnets piezoelectric force microscopy BaTiO3 Copolymer Scratch Electical&Electronics PvdfFilm Granada Self-assembledMonolayer AnodizedAluminumOxide NanoLithography hetero_structure Filter MultiferroicMaterials Friction Chemical_Vapor_Deposition chemical_compound thermoplastic_elastomers Pattern Sidewall Domain polymeric_arrays PolyvinylAcetate Regensburg BlockCopolymer mechanical property C_AFM