TemperatureControllerStage HiVacuum BTO MagneticForceMicroscopy AtomicLayer Memory Conductive AFM DeoxyribonucleicAcid Wonseok HydroGel Chungnam_National_University SAM Scanning_Thermal_Microscopy bias_mode OxideLayer Tungsten_disulfide PpLdpe Polymer ConductingPolymer layers WWafer IcelandSpar ElectrostaticForceMicroscopy Gallium_Arsenide FloppyDisk IndiumTinOxide Indent Ananth food FuelCell Kevlar LightEmiting aluminum_nitride Lateral DOE