FFM 2dMaterials Nickel OpticalWaveguides Ucl GranadaUniv HanyangUniv Christmas light_emitting Fe_film bias_mode 3-hexylthiophene membrane ScratchMode Transparent AtomicSteps Polyaniline strontiu_titanate LiftMode Mfm DNAProtein Heat Imprint mechanical_property MechanicalProperties Korea EFM Tungsten_disulfide Hafnia HydroGel Solution Solar Phase hard_disk_media AdhesionForce