Dental MetalCompound NTU Bacteria multi_layer Tungsten_disulfide Ferrite Growth ElectrostaticForceMicroscopy Resistance SICM CancerCell SiliconCrystal DOE BismuthVanadate bias_mode BoronNitride layers Ni81Fe19 Piranha Polyethylene Strontium Led C36H74 Scratch Graphene Multiferroic_materials Pinpoint vertical_PFM Patterns semifluorinated alkane nanobar ChemicalCompound ForceVolume thermoplastic_elastomers