Al2O3 ScanningKelvinProbeMicroscopy Cross-section TCS Hexylthiophene Polystyrene ForceDistanceSpectroscopy Wang AlkaneFilm Piezoelectric Water Magnetic Force Microscopy Writing CopperFoil frequency_modulation Transparent LiftMode Strontium Semiconductor CuSubstrate Subhajjit SolarCell LeakageCurrent cannabidiol doped VinylAlcohol gallium_nitride Composition Fujian Genetic ito_film ThinFilm MagneticForceMicroscopy Indium_tin_oxide lift_mode