layers PtfeFilter MultiferroicMaterials TyphimuriumBiofilm Conductive AFM Fe_film Polyethylene temp UnivCollegeLondon semifluorinated_alkanes SKKU Device lift_mode ForceVolumeMapping self-assembly nanomechanical SoftSample atomic_layer Ni-FeAlloy Scanning_Thermal_Microscopy suspended_graphene LiftMode MembraneFilter SiliconCrystal AtomicSteps PinPointMode mechanical_property MLCC SicMosfet Aluminum INSP Nanopattern Stiffness Piranha DIWafer