TemperatureControllerAFM self_assembly Typhimurium NUS_NNI_Nanocore PVAC Pinpoint phase_change Defects Semiconductor CastIron PS_PVAC Potential HOPG TipBiasMode AdhesionForce SPMLabs BTO PtfeMembrane aluminum_nitride NiFe Piranha Topography single_layer Cobalt-dopedIronOxide Force-distance semifluorinated_alkane strontiu_titanate SoftSample piezoelectric force microscopy Mechanical&nanotechnology PMNPT Ceramic Organic PhaseChange PhaseImaging