Resistance HumanHair PECurve PFM VerticalPFM Trench Sphere BismuthVanadate dielectric_trench CaMnO3 SKKU PinPointMode HfO2 GaAs AM-KPFM P3HT TappingMode Insulator Melt Potential Polarization GaN Hysteresys ThermalConductivity NtuEee semifluorinated_alkanes Scratch Sapphire Indium_tin_oxide doped mechanical property atomic_steps Sadowski AAO CancerCell