ForceDistanceSpectroscopy LateralPFM polyvinyl acetate high_resolution fluorocarbon MultiferroicMaterials Step HardDiskMedia BismuthFerrite CarbonNanotube SiliconOxide temp_control UnivOfMaryland VinylAlcohol AIN GaN ElectroChemical Au111 Switching nanomechanical graphene_hybrid CeramicCapacitor Non-ContactMode Tungsten Steps LiBattery oxide_layer AM_SKPM Polyethylene Cobalt-dopedIronOxide Christmas Vinylpyridine Praseodymium BFO Conductance