Conductance HexagonalBoronNitride PinpointPFM CVD Al2O3 hard_disk HiVacuum Scratch BismuthVanadate LateralForceMicroscopy domain_switching ReflexLens Change Gold Tungsten_disulfide Sic fluoroalkane Sulfur Flake Metal Wonseok BCZT FM_KPFM WS2 AlkaneFilm DentalProsthesis hard_disk_media Led Sperm TPU conductive Vortex Conducting atomic_steps Ni-FeAlloy