PolyimideFilm LateralPFM Mapping Ananth SICM HOPG Etch Multiferroic_materials PhaseChange ReflexLens Boundary Hafnia SmalScan SelfAssembly kelvin probe force microscopy AtomicSteps flakes Composite Nanopattern NanoLithography Polydimethylsiloxane HardDiskMedia OrganicCompound Vortex align Yeditepe Austenite domain_switching HexagonalBN PinpointNanomechanicalMode IVSpectroscopy FrictionForce aluminum_nitride Edwin LDPE