SurfaceChange Oxide MechanicalProperty SICM India SRAM Typhimurium exfoliate VerticalPFM Morphology Tungsten FrequencyModulation Dopped Inorganic medical optoelectronics non_contact Metal norganic AAO mono_layer Celebration Polyethylene vertical_PFM Tin sulfide Ptfe INSP Thermoplastic_polyurethane Strontium Vac PiezoelectricForceMicroscopy Change dichalcogenide OpticalElement Aluminium_Oxide