Conductive AFM HexacontaneFilm Polystyrene LeakageCurrent Polyvinylidene PetruPoni_Institute Nanotechnology PhaseChange Phosphide dielectric trench Silicon Composite Magnets OrganicCompound ElectrostaticForceMicroscopy PetruPoni Polarization multi_layer KPFM Dr.JurekSadowski pulsed_laser_deposition molecules FM_SKPM Grain Bio FM-KPFM TipBiasMode ConductiveAFM MultiferroicMaterials Device Ucl Microchannel DNA PolyvinylAcetate PpLdpe