SRAM Layer mechanical_property FrictionForce PS_PVAC HighAcpectRatio DeoxyribonucleicAcid UnivMaryland Alloy PhaseTransition hydrocarbon Thermoplastic_polyurethane NCM\ TemperatureControlledAFM Photovoltaics conductive FM_SKPM mono_layer Metal-organicComplex layers BiasMode amplitude_modulation ScanningSpreadingResistanceMicroscopy Sulfur hard_disk Trench Au111 Piranha Phosphide Leakage AmplitudeModulation Chrome TungstenThinFilmDeposition Resistance FloppyDisk