Sphere AtomicLayer Indent FloppyDisk Tungsten_disulfide C_AFM Stiffness HfO2 InsulatorFilm Reduction Biofilm PVAC Potential Nanostructure Barium_titanate OxideLayer HafniumDioxide doped TipBiasMode Wonseok Dr.JurekSadowski Silver WS2 H-BN NtuEee DNA Pipette cross section Wafer Temperature hard_disk SrO Polystyrene Copolymer Sapphire