CancerCell cross section Blood norganic Conduct nanobar LiquidCell conductive Vinylpyridine LowDensityPolyethylene Ni81Fe19 Sapphire Pinpoint PFM Electronics small_scan Vanadate HDD Alkane cannabidiol Conductance Vacuum ForceMapping VinylAlcohol SThM BiasMode MESA structure Fiber SiliconCrystal polymeric_arrays Calcite molecule LiquidImaging Genetic block_copolymer ContactMode