Bismuth Ptfe Memory ForceMapping Anneal MoS2 Au111 MolecularSelfAssembly Electrode Force-distance LateralForceMicroscopy SPMLabs INSP CNT strontiu_titanate China Cobalt-dopedIronOxide PvdfFilm Lateral ring shape Monisha Conductivity CarbonNanotube Hexacontane Led Liquid Pzt Metal Subhajjit WWafer AtomicLayer fluoroaalkane ContactModeDot IIT-chennai dielectric_trench