BFO Hysteresys layers PVAP3HT FM-KPFM PMNPT Polytetrafluoroethylene ForceMapping high_resolution Optoelectronic CBD SThM Hair OpticalWaveguide Sio2 Ecoli gallium_nitride 2d_materials mechanical_property Sphere Treatment ThermalConductivity CrystalGrowing non_contact Pinpoint PS_PVAC self_assembly Conductivity Polyvinylidene_fluoride Sadowski I-VSpectroscopy GlassTemperature AM-KPFM BismuthFerrite Bio