PS_PVAC ForceMapping SurfaceChange Gallium_Arsenide PinpointNanomechanicalMode self_assembly FrictionalForceMicroscopy AM_SKPM TiO2 PhaseChange Phthalocyanine EFMAmplitude Optic PolyimideFilm Lateral SThM Croatia Workfunction Polydimethylsiloxane Sphere AnodizedAluminumOxide StainlessSteel ScanningThermalMicroscopy MESA structure MechanicalProperties SiliconeOxide Topography Global_Comm CntFilm Wang FrictionalForce mono_layer Insulator Tungsten_disulfide LiquidCell