P3HT Oxide BreastCancerCell Steps FloppyDisk hard_disk Platinum 2dMaterials Terrace Conductive AFM Current atomic_layer ring shape FastScan BiFeO3 PECurve ContactModeDots food Sphere Anneal Polymer Worcester_Polytechnic_Institute GalliumPhosphide Optic India Reduction Fluoride Thermal HexagonalBoronNitride LateralForce AM_SKPM NusEce Multiferroic_materials Gallium_Arsenide 2-vinylpyridine