fe_nd_b cooling MBE Litho PetruPoni mono_layer Array Silicon silicon_oxide CBD ferromagnetic Bismuth Optic InLiquid Insulator Tungsten Ferrite DeoxyribonucleicAcid BiasMode ElectrostaticForceMicroscopy DNA CuSubstrate thermoplastic_elastomers Piezo ring shape AtomicSteps Tape NCM\ electrospinning molecules BiFeO3 Implant Fe_film SingleLayer MagneticPhase