PS_LDPE DeoxyribonucleicAcid domain_switching Electrode Oxide Vacuum kelvin probe force microscopy mechanical_property hetero_structure mfm_amplitude Nanopattern NUS_Physics Tin disulfide NusEce TemperatureControlledAFM Molybdenum non_contact HOPG CntFilm LateralPFM SoftSample PolymerBlend CrAu Wonseok LiquidCrystal LaAlO3 Sphere Galfenol Cobalt-dopedIronOxide PhthalocyaninePraseodymium CuParticle fluoroaalkane Graphite Barium_titanate PvdfFilm