atomic_layer SFAs VerticalPFM TipBiasMode Ferroelectric Tin sulfide BiasMode ScanningIon-ConductanceMicroscopy PinpointPFM FrequencyModulation ElectroDeposition CBD TriGlycineSulphate Gallium EFMAmplitude Ca10(PO4)6(OH)2 Nanofiber Worcester_Polytechnic_Institute Switching polyvinyl acetate atomic_steps Conductance Crystal NanoLithography Mechanical&nanotechnology Mobile IRDetector Au111 TransitionMetal Piezoresponse SAM Polyvinylidene_fluoride Semiconductor Nanostructure small_scan