NeodymiumMagnets neodymium_magnets DNA Polytetrafluoroethylene AAO PiezoelectricForceMicroscopy Gallium PvdfFilm Growth PvdfBead Ecoli Plug ForceVolume Crystal Ferroelectric Granada Mosfet PtfeMembrane light_emission Lateral_Force_Microscopy Cobalt-dopedIronOxide Writing PolyvinylAcetate Indent Polarization Pores FrictionForce Calcium IcelandSpar EFMAmplitude EFM Beads UnivOfMaryland tip_bias_mode Composition