KAIST NiFe Hafnia Resistance Hole YszSubstrate Tungsten_disulfide Piranha Mfm PANI Led ContactModeDot Ferroelectric StainlessSteel OpticalWaveguides NUS tip_bias_mode biocompatible Oxidation Defects MechanicalProperties MolybdenumDisulfide temp AIN ScanningIon-ConductanceMicroscopy Edwin SmalScan Lanthanum_aluminate self-assembly Imprint Graphene Gold CrystalGrowing norganic Foil