high_resolution temperature_control STM Mapping Titanate University_of_Regensburg STO layers SKKU PrCurve MfmAmplitude WPlug atomic_layer DLaTGS Switching optoelectronics Grain Singapore ForceVolumeMapping Nickel Cross-section FrictionalForceMicroscopy LiBattery PolyStylene Techcomp self-assembly LiftHeight Vortex OpticalWaveguide Ni81Fe19 Wang Thermoplastic_polyurethane multi_layer Yttria_stabilized_Zirconia Barium_titanate