CancerCell KPFM bias_mode Ca10(PO4)6(OH)2 Yttria_stabilized_Zirconia CalciumHydroxyapatite light_emitting Growing Gold HACrystal FAPbI3 Crystal BariumTitanate Roughness Ferroelectric ForceMapping MonoLayer MechanicalProperty SThM SICM atomic_steps FrictionForce Scratch Polytetrafluoroethylene ThinFilm Ni81Fe19 IMT_Bucharest Ananth Dental CuSubstrate Polyimide Polarization Inorganic_Compound OrganicCompound #EC