TiO2 Nickel MechanicalProperty Magnetic Force Microscopy CP-AFM Sapphire Led UnivOfMaryland Gold vertical_PFM Bacterium ForceDistanceSpectroscopy Resistance Polarization TempControl PDMS Battery Fe_film CVD Device GaN Step C60H122 LDPE EvatecAG PatternedSapphireSubstrat electrospinning PolyimideFilm Galfenol DataStorage Zhi OpticalWaveguide HiVacuum Electrode thermal_property