AlkaneFilm ConductiveAFM fluoroaalkane Hair SRAM Self-assembledMonolayer Polyaniline Conductive AFM mono_layer PtfeFilter ThinFilm Sulfur Perovskite MeltingPoint SingleLayer GranadaUniv ScanningSpreadingResistanceMicroscopy UTEM NUS_Physics SetpointMode CeNSE_IISc non_contact Magnetic Graphite Wonseok molecule C36H74 Lateral_Force_Microscopy tip_bias_mode Film SKKU multi_layer IMT_Bucharest STM Ecoli