SurfaceOxidation PvdfBead Oxide KPFM Wildtype molecular_self_assembly Annealing UnivCollegeLondon mono_layer Barium_titanate FM-KPFM IVSpectroscopy Cancer SKKU C_AFM Gong HexagonalBN chemical_compound silicon_oxide NtuEee Ito Leakage CuSubstrate Resistance Fe_film Edwin Varistor SiWafer ElectroDeposition NUS Wonseok Ferroelectric Magnets India Chrome