HBN Sic BiFeO3 UnivOfMaryland hetero_structure Cancer PVAC Force-distance SRAM Memory NUS_Physics ForceVolumeMapping oxide_layer gallium_nitride Writing AM-KPFM TungstenDeposition Grain atomic_steps PtfeFilter Barium_titanate Chungnam_National_University TransitionMetal Croatia norganic Neodymium mechanical_property LiftMode fluorocarbon Hydroxyapatite Polypropylene PFM PpLdpe CarbonNanotube Magnetic