Tungsten_disulfide PolymerBlend NiFe PVA NCM\ atomic_layer FastScan Gold high_resolution MfmPhase Pore atomic_steps KelvinProbeForceMicroscopy Worcester_Polytechnic_Institute LiIonBattery FrictionalForceMicroscopy self-assembly HDD YszSubstrate 2d_materials Copolymer SetpointMode EFM Topography HardDisk Wang Gallium PFM CntFilm Hydroxyapatite Potential multi_layer Piezo Corrosion SiliconOxide