Ram Pinpoint PFM molecules Imprint Dimethicone Fiber SSRM Bio Graphene Fujian Cobalt-dopedIronOxide India Friction mfm_amplitude SKKU NeodymiumMagnets Current DOE Terrace University_of_Regensburg InorganicCompound semifluorinated_alkane hard_disk KelvinProbeForceMicroscopy PDMS ElectroChemical HumanHair Korea Annealed PVA CrAu cooling EFMAmplitude LDPE Semiconductor