SKKU align heterojunctions KPFM Imprint ForceDistanceSpectroscopy ScanningKelvinProbeMicroscopy Pyroelectric CompactDisk Reading hydrocarbon Alkane ferromagnetic Biofilm HardDiskMedia Ni-FeAlloy Tape ForceMapping CopperFoil ItoGlass LogAmplifier H-BN Sio2 Hexatriacontane dichalcogenide non_contact FastScan temperature_control Display Celebration Composition Au111 MagneticArray PetruPoni_Institute CuFoil