aluminum_nitride Polytetrafluoroethylene KelvinProbeForceMicroscopy StrontiumTitanate ScanningKelvinProbeMicroscopy biocompatible IMT_Bucharest TPU CancerCell Calcium NanoLithography FrictionalForceMicroscopy Global_Comm BoronNitride LiftMode MonoLayer Reading Thermal atomic_steps ReflexLens NiFe FM_SKPM SFAs YszSubstrate DNAProtein Gold Ceramic Lattice MagneticArray Writing HanyangUniv Hexacontane FrictionForce Temperature Conduct