PFM FrictionForce optoelectronics Co/Cr/Pt ContactModeDot Carbon Jason Polyvinylidene_fluoride LiftMode BariumTitanate SKPM OpticalWaveguide vertical_PFM OpticalElement NtuEee CalciumHydroxyapatite Croatia fe_nd_b Melt strontiu_titanate TiO2 lift_mode MechanicalProperty RedBloodCell Terrace Inorganic Calcite Phenanthrene Nanofiber PhaseTransition Tungsten Electrode LFM UnivOfMaryland HanyangUniv