oxide_layer NUS_NNI_Nanocore BiFeO3 NtuEee plastic TCS cannabidiol Ananth Imprint Hair 2dMaterials self_healing hydrocarbon VerticalPFM TappingMode Perovskite MfmPhase HardDiskMedia Inorganic_Compound CP-AFM Oxidation WPlug flakes LightEmission #EC Polyvinylidene Yttria_stabilized_Zirconia CrossSection Strontium Scanning_Thermal_Microscopy FrictionalForce Chrome Jason Polyethylene HardDisk