fe_nd_b Insulator Photovoltaics semifluorinated_alkane SurfaceOxidation BTO LiNbO3 LateralPFM ContactMode SmallScan LateralForce Optoelectonics ring shape MultiferroicMaterials PyroelectricDetector nanobar HardDiskMedia PDMS Phosphide NCM\ HydroGel 2-vinylpyridine TipBiasMode GaAs Cancer Ni-FeAlloy CuFoil self-assembled_monolayer molecular_self_assembly Blood Vac Mechinical KAIST CalciumHydroxide SrTiO3