STM Defect semifluorinated_alkanes LightEmission phase_change Resistance mechanical property BismuthVanadate cannabinoid Adhesion Composite HumanHair Defects GlassTemperature PrCurve Topography AM_KPFM Chemical Vapor Deposition SelfAssembly Biology Edwin Worcester_Polytechnic_Institute MBE ForceMapping Anneal SSRM ScanningIon-ConductanceMicroscopy Force-distance Hexacontane Wafer epitaxy SFAs Wang H-BN mono_layer