SKKU Transparent Force-distance OrganicCompound suspended_graphene self_healing WPlug Ferroelectric amplitude_modulation Tape DiffractiveOpticalElements AM-KPFM HiVacuum GalliumPhosphide Nanofiber Pinpoint MagneticForce PetruPoni_Institute MESA structure Ecoli Beads #EC Chemical_Vapor_Deposition PolyStylene Hexatriacontane CarbonNanotube MolecularSelfAssembly Polyurethane Boron 2dMaterials ScanningKelvinProbeMicroscopy MfmPhase dielectric_trench STO atomic_steps