Force-distance Chungnam_National_University Nanopattern C60H122 Holes atomic_steps PolyvinylideneFluoride pinpoint mode EFMAmplitude Solution LightEmission Graphite Permalloy PMNPT ShenYang Bmp Yeditepe_University Tungsten BTO SSRM heterojunctions silicon_oxide Mechanical&nanotechnology FM_KPFM Ni81Fe19 Calcite semifluorinated alkane Reduction HfO2 Ceramic cannabidiol Led SKKU PFM EvatecAG