FM-KPFM Permalloy LiquidCell SiWafer polyvinyl acetate MBE Scratch Dopped PatternedSapphireSubstrat Chungnam_National_University Collagen Indium_tin_oxide pinpoint mode LiftMode PhaseTransition Switching Lanthanum_aluminate Adhesive OxideLayer Array WS2 IndiumTinOxide CopperFoil Vortex ScanningKelvinProbeMicroscopy HACrystal Photovoltaics atomic_steps ThermalConductivity PolyStylene BloodCell Barium_titanate fluorocarbon LightEmission VerticalPFM