Praseodymium Electrical&Electronics InsulatorFilm Defects Zhi Materials contact plastic Vortex VortexCore SrTiO3 non_contact C60H122 PolyvinylAcetate TriGlycineSulphate Nickel GranadaUniv Floppy Electrode Non-ContactMode organic_polymer Inorganic Growing Molybdenum nanobar PhaseTransition PECurve Writing #EC ForceMapping PVAP3HT Polystyrene NusEce Ptfe Chungnam_National_University