tip_bias_mode HexagonalBoronNitride EPFL PMNPT Indent Plug Array UnivOfMaryland kelvin probe force microscopy Praseodymium Piranha molecule Defect Genetic VortexCore hydrocarbon LFM ThinFilm Ucl Iron PS_PVAC CastIron Insulator AIN LDPE UnivCollegeLondon Metal-organicComplex Leakage optoelectronics Pyroelectric Inorganic_Compound ForceDistanceSpectroscopy Nanostructure #EC Annealing