bias_mode molecular_beam NUSNNI Roughness sputter heterojunctions AM-KPFM Hexacontane gallium_nitride WWafer Patterns BiFeO3 Protein 2d_materials FAFailureAnlaysis molecules Ceramic Gold thermal_conductivity C_AFM Granada OpticalWaveguide BismuthFerrite HexagonalBoronNitride Photovoltaics semifluorinated_alkanes GaP LightEmission ForceMapping MolecularSelfAssembly Polyimide ScanningThermalMicroscopy Ferroelectric Grain HOPG