epitaxy Co/Cr/Pt HighAspect Terrace flakes Pinpoint UnivOfMaryland ContactModeDot PetruPoni_Institute TransitionMetal Electronics SrO frequency_modulation Resistance PinpointPFM TungstenDeposition BFO KevlarFiber Oxidation SFAs tip_bias_mode PolyvinylideneFluoride Protein hard_disk solar_cell MagneticForceMicroscopy University_of_Regensburg fluorocarbon Sulfur VinylAlcohol ThermalConductivity Flake Wildtype electrospinning Blend