C36H74 Optoelectronic ForceVolumeImage bias_mode SiWafer Plug Array non_contact FrequencyModulation single_layer BreastCancerCell NanoLithography multi_layer Polyimide BiFeO3 medical Cross-section contact Calcium SoftSample Inorganic_Compound ScanningTunnelingMicroscopy Layer PS_LDPE MoS2 Anneal hetero_structure graphene_hybrid Nanopattern HanyangUniv Roughness Monisha MolecularSelfAssembly Optical Trench