Polarization gallium_nitride Temperature Magnetic Force Microscopy cooling Step 2d_materials Ecoli SetpointMode Praseodymium Resistance GaAs Strontium Hexatriacontane ForceMapping Domain NUS_NNI_Nanocore MembraneFilter CarbonNanotube molecules KevlarFiber PECurve CuFoil Croatia Foil Potential BiasMode VerticalPFM Wafer Morphology organic_polymer semifluorinated_alkane AEAPDES CastIron NusEce