BaTiO3 BTO amplitude_modulation FrictionalForce ElectrostaticForceMicroscopy DOE CuParticle DataStorage Polytetrafluoroethylene Polyvinylidene CBD domain_switching Gold CuSubstrate Perovskite InLiquid #Materials LateralPFM Pores nanobar CHRYSALIS_INC Foil NtuEee Annealed Reduction Formamidinium_lead_iodide contact SiliconOxide Pipette Hair Yttria_stabilized_Zirconia graphene_hybrid Microchannel mfm_amplitude Materials