temp HfO2 Wonseok polyvinyl acetate temperature_control FrictionalForceMicroscopy Alkane Reading mfm_amplitude Vacuum NeodymiumMagnets Terrace flakes PolycrystallineFerroelectricBCZT SrO dichalcogenide Praseodymium molecules Zhi HiVacuum electrospinning Graphite chemical_compound FM_SKPM Polyimide high_resolution Filter Corrosion SiWafer TungstenThinFilmDeposition InLiquid Patterns SSRM mono_layer MonoLayer