MonoLayer self_assembly Insulator lift_mode Scratch GaP Lateral_Force_Microscopy Semiconductor Polyimide Composite GranadaUniv Switching Potential NUSNNI Jason FuelCell OpticalModulator conductive Etch ConductiveAFM ForceDistanceSpectroscopy Aluminium_Oxide molecular_beam Mechanical&nanotechnology Step HafniumDioxide Inorganic_Compound Calcium LowDensityPolyethylene MetalCompound nanobar Sio2 #Materials Au111 Chemical_Vapor_Deposition