Cross-section Device Conduct HydroGel FM_KPFM SurfaceOxidation P3HT C60H122 LiquidImaging CrossSection MultiferroicMaterials FuelCell SiliconCrystal Defects Resistance kelvin probe force microscopy Gold PyroelectricDetector LogAmplifier Force-distance Materials HexagonalBoronNitride Annealed Boron contact TungstenDeposition Tungsten_disulfide PetruPoni FM-KPFM optoelectronics EvatecAG BlockCopolymer Liquid Polypropylene Film