food ChemicalCompound silicon_carbide Defect MagneticForceMicroscopy hetero_structure Transparent NUSNNI Dimethicone AdhesionForce MfmAmplitude Device Sphere BiFeO3 CuFoil Copper non_contact Led Adhesive Tape PECurve ScratchMode self-assembled_monolayer sputter bias_mode Ni81Fe19 FrictionForce plastic PhaseImaging SurfaceChange HanyangUniv SKKU piezoelectric force microscopy SiliconCrystal Sio2