MfmPhase FrictionalForce HDD mono_layer fifber CrAu HumanHair Phosphide BiVO4 Tape Iron Yeditepe_University Ptfe NusEce Composition ito_film Stiffness Hexylthiophene StrontiumTitanate CalciumHydroxyapatite Nanotechnology Tin disulfide Piezoresponse bias_mode CalciumHydroxide YszSubstrate LifeScience SKKU FuelCell Metal BloodCell Etch Water vertical_PFM atomic_steps