AAO Techcomp cannabidiol Switching HfO2 PatternedSapphireSubstrat ScanningTunnelingMicroscopy China Growing Display self_healing SICM CopperFoil HexacontaneFilm SKKU hetero_structure single_layer LiquidCell Steps ScanningKelvinProbeMicroscopy PtfeFilter MagneticForce Sapphire BlockCopolymer Floppy MESA structure atomic_steps high_resolution Titanate semifluorinated_alkanes Laser SKPM MagneticForceMicroscopy MLCC KevlarFiber