Formamidinium_lead_iodide TemperatureControlledAFM Korea Defects Conductive AFM Polyaniline TiO2 mechanical_property SolarCell Composition Heating atomic_layer I-VSpectroscopy StainlessSteel StyreneBeads chemical_compound P3HT Topography ContactMode Copolymer Zagreb RedBloodCell HBN NCM\ oxide_layer gallium_nitride ItoGlass Cancer self-assembly DNAProtein dielectric trench KPFM margarine InorganicCompound molecules