ChemicalCompound margarine Polytetrafluoroethylene Pzt mfm_amplitude HumanHair PinpointPFM ring shape Switching temp_control ferromagnetic Carbon Chrome YszSubstrate self-assembled_monolayer Heat PtfeMembrane Piezoelectric Nanotechnology Hole Vortex Conductive AFM Reduction Hexatriacontane Aluminium_Oxide YttriaStabilizedZirconia Polyurethane Biology PetruPoni IMT_Bucharest fluoroaalkane TCS Trench TipBiasMode CuSubstrate